I don't know, it seems like these rankings aren't really accurate - students themselves go to the review site and vote...but i mean i'm sure the voting gets screwed up somehow, being not scientific or whatnot.
Interesting that UCSC is number 3 on the party list. Living in the Bay area and having numerous of my friends who go there, I have never heard that UCSC is a party school. Instead, I heard it's totally laid-back and has a chill-atmosphere...definitely not what I would envision as a party school??