Heh, yes, you're right, but on the Portnoy forums, there wasn't a case of "but so-and-so has Dream Theater". I honestly don't remember the lists very well, but I've certainly noticed some people are motivated differently here. I guess on the Portnoy forum, the thing was more "how prog is the list?" The more prog a list was, the more popular it was, whether or not it was heavily swayed towards Dream Theater or any of Portnoy's other bands like Transatlantic or Liquid Tension Experiment.
I guess, for me personally, I want a list that is immensely enjoyable. I would rather a great, consistent list with no U2 than a somewhat decent list that happens to have a few U2 songs.