EPTPoor sample of population to use a gaming site, though i'm sure you are just posting this too many friends etc. it's still a bit iffy. You also don't seem to have a real check if people filling this in are really americans or have studied at all, I just checked quickly to see what it was about but it's not unreasonable to think many non-americans or whatever fill this in if you advertise it through a site such as TL.
Also using terminology like 'so-so' on your scale is a bit unprofessional.
I know doing proper scientific research is usually not the most important thing for dissertations in language studies etc. but it's still silly to see poor methodology like this so much.
Nevertheless the problem at universities of poor language is quite common especially here in the Netherlands. Lectures are often in english while practically none of the speakers are native english. Most of the dutch teachers are easy to understand but poor pronounciation can range from quite good to often very unprofessional. Accent I don't find so troublesome mostly except for the distraction because it's humorous, wrong choice of words is often worse. Most classes I had are fairly small though and had good reference works (sheets and books) so even if a lecturer was downright awful it wouldn't be that bad..
