That's because the 7 drivers are better? vista's issue all along was drivers, they became better and better, I use 7 now and again and honestly it may be better than Vista but not by much as the benchmarks prove. 7 takes advantage of the faults Vista had.
On that OLD PC I'm referring to I've put XP on again because it flies, even with the 512MB of Ram.
You need to drink the KOOL-AID like the others, and BELIEVE!
Then chant: "7 is faster than XP and Vista", repeat x 10,000,000