The poll's actually pretty solid, and I say that as a professional statistician and survey researcher, who's taught both statistics and survey research at universities for 16 years. There are certainly some sampling issues, but those are somewhat overcome both by the sample size (which has neared 4,000 for some previous polls) and by the *overwhelming* clarity of the results:

If TTE was widely regarded as as great as you may believe that it is, it wouldn't have been mentioned more than any other song in the "Worst Phish Song" thread and it wouldn't have such a decisive lead in the current poll, with nearly three times the proportion as a break-even split of the 7 songs would be. It's beating out Caspian (which sux in nearly objective terms), Dinner and a Movie (which is immensely annoying), and even Jennifer Dances (which no one defends).