First, the average game length(all matchups) by tournament, which was the question that started it all:
http://i.imgur.com/WZmGn.png
![[image loading]](http://i.imgur.com/WZmGn.png)
I used the records page on GOMTV to find the average game length on the different GSL tournaments and matchups, to see how that changed as time passed. It was basically inspired by what Day9 said in SotG 42 about how game lengths must have increased as the first seasons were mostly all ins. It doesn't show the ongoing tournaments.
Not all matchups were played enough to be statistically significant in most cases, but they were all used. The 3 first GSTL didn't have that many matches, so each matchup there is of course with a smaller amount of games and more vulnerable to random variances. The only matchups that weren't played at all in a tournament were PvP in GSL Open 3 and ZvZ in GSTL May (which is why you'll see them below the bottom in some of the graphs).
Even though Terran were doing pretty well in the first 3 GSL, there weren't that many mirror matches. The highest was GSL2 with 27 TvT, in comparison there were 48 TvT in GSLJan, 52 TvT in GSL Super Tournament and 57 TvT in GSLMay. I don't know the amount played in the other matchups, because everything but mirror matchups was pulled directly from the GOMTV stats page (they don't show avg game time for mirrors -_-).
Here's the summary of all matchups, all times are in Blizzard minutes, even though time on the GOMTV page are in real minutes. Each matchup is given from the perspective of the winner, so ZvP means a Zerg won in that game time, and PvZ means a Protoss won in that game time.
![[image loading]](http://i.imgur.com/NNJi2.png)
As expected, ZvT, TvZ and TvT games last for a pretty long time, while ZvZ and PvP are a lot shorter. One interesting anomaly was GSL3 ZvZ, which had an average game time of 20 minutes with 6 games played(Nestea vs Sen, Tosyad vs FD and TheWind vs GoldenfOu).
You also have GSL3 being the season with the longest games on average, and GSLMay having the shortest games. In general the game length goes up to a top on GSL3, then get shorter until GSLMay, and have been increasing since then(but still shorter than GSL2).
These are the numbers used for the graphs, the sum row and column aren't weighted by amount of games, but I hope it wouldn't have made the numbers completely different (weighting would mean if there was 10 1 hour PvZ but 1 10 minute PvP and PvT, the weighted average would be 52 minutes for Protoss instead of the 27 minutes that the simple sum column would show).
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Graph in the PvT matchup
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PvZ
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ZvT
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Protoss wins
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Zerg wins
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Terran wins
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Mirror matchups
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Another thing I did for fun was a way of calculating the chance of getting different matchups in semifinals and finals of a tournament, given the way the brackets were set up with the different races and that each player had a 50% chance of winning the series. Since it's not 50% chance to reach the next it's not really useful for anything, but was still a bit fun to work it out.
With that spreadsheet the Super Tournament had a 3.7% chance of getting the TvT TvT semifinals it did, with TvT TvZ at 11.2% being most likely and PvP PvP at 0.03% being least likely.
Edit:
All the next are weighted by amount of games. It doesn't mean all the above are wrong, it's just the correct way to show total averages in a tournament.
First, the average game length(all matchups) by tournament, which was the question that started it all:
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Then, the game length in a matchup put together by tournament, to compare between matchups:
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Average game length over the seasons so far, sorted by game length and showed by matchup(ZvP is still only for games zergs won, ZvP/PvZ is for both put together):
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And then some stats used to make the graphs in the end:
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Some fun facts from that (remember all are in game time):
-There's been 1386 games up to and excluding the current seasons so far, at a total of 432.5 hours.
-There's been 392 ZvT, 358 PvT, 272 TvT, 218 PvZ, 77 PvP and 69 ZvZ.
-134 hours of ZvT, 108 hours of PvT, 92 hours TvT, 65.5 hours PvZ, 17 hours of ZvZ and 15.7 hours of PvP(even with 8 more PvP played).
-The teamleagues had a different matchup that was played most for each one. The first had PvT (18 vs 8 TvT at second place), the second had TvT (13 vs 10 ZvT at second place) and the third had TvZ (17 vs 9 ZvP).
-The average GSL game is at 18:43 in game time.