I dunno x64 just still seems slower to me. I was using 7022 x86 and clean installed 7048 x64 yesterday.
These guys benchmarked it and results are still disappointing. Apps like Winrar and 7-zip are still slower due to the WOW emulation, we need 64 bit versions of these type applications. Quickpar is still dog slow in x64 too. HD access is alot slower too.
IE 8 is alot more stable now, obviously later build..