All Speed test 8 is a clear winner, games, apps, boottimes, multi tasking/switching. Been gaming and using Dreamweaver, 3dmax, the performance is well ahead in my work. I could only use 2 of this programs in 7. Windows 7 in most case freezes or stalls during the load of 3dmax, with the exact same programs loaded, I was unable to play bf3 without lag in windows 7, Windows 8 breezed with little to no interference. techspot has a great comparison. Gamers have the winning edge in games because 8 does make your pc faster then it predecessors
http://www.techspot.com/review/561-windows8-vs-windows7/page2.html
http://www.techspot.com/review/561-windows8-vs-windows7/page2.html