I guess I personally can see how this list is a bit iffy, being NOT only April 1st, but also some odd BLs in here and some odd OUs going out of the picture.
I kind of can understand Hippowdon's case in going down in usage, but that's because stall is starting to become unpopular. The same for Abamosnow and I guess Dusknoir, though I don't see how it was ever stall-material in the first place and not Spiritomb. God, Dusknoir dissapointed me!
I guess I could see how Rhyperior has a chance to climb. Getting Solid Rock fixed help, but it's true it needs some investment in some Special Defense and a Sandstorm to stay solid. Still, you can't shrug off most of his impressive Attack, HP, and Defense stats. It's almost crazy TO, but the weaknesses don't help. I remember I used an "okay" paralysis team with Swords Dance Rhyperior in it, and allow me to say it sweeps like mad just if it's allowed a Swords Dance. He outspeeds most of the walls, and to me that's all that mattered for him. Using him as a physical wall is no-no to me however.
I guess what confuses me the most is Arcanine and Aerodactyl being OU. Ok, maybe not so much on Aerodactyl, but moreso Arcanine. It did however get a semi-decent movepool (physical Thunder Fang, Flare Blitz, Extremespeed. Special Dragon Pulse, Hidden Power, Flamethrower)... if only he had Earthquake...
The prediction list kind of reminds me of the NCAA brackets, because there were formulas and such there for predicting things like this. I guess I can't say I extremely disagree with the "new OU list" but I can't say I totaly agree with it.