If you don't, maybe share a bit about Windows 8 was faster (or slower) for a certain task (i.e. booting up, shutting down, etc). Of course, make sure that your conclusions are completely dependent on the OS difference (don't say that Windows 7 took longer to defrag for example, because that's 99% affected by your personal usage).
I probably don't need to say it, but obviously we won't be able to compare Windows 7 to the final product for a while- so this is just a rough analysis. If Win8 is faster now, there's a pretty good chance the final build will also be.
EDIT: I'll add in that I've been using the Public Preview very lightly, and so far have not been blown away by the performance. I'll benchmark when I get access to my old laptop where I have it installed later this week.
Edited by SausageHack, 04 June 2012 - 01:56 PM.