I don't think PERFORMANCE counts, at least in my book. FEEL is more important, and that takes into account a LOT of things, not limited to the OS itself.
One reason is this :
The reason being that Windows 8 saves a copy of the system state and memory contents to the harddrive and then simply reloads this once you restart. This is why it’s so much quicker at starting up as it doesn’t have to go and load everything from scratch.
So what would W7 look like if you could do that?
This also isn't the final release tested. Who knows what will be added or changed?
From the above, this appeared to a be a clean install and it isn't stated what 'else' was installed? What will it do with all the apps and startup you have is the $64,000 question.
Significantly this little tidbit :
The key thing here is startup. Windows 7 still takes just too long to get usable, and Windows 8 finally remedies this drawback. Browser performance is also notably better, and it's encouraging that Geekbench showed a little improvement and PCMark 7 a significant one.
Note that there wasn't a lot of improvement in GeekBench but PCMark7 had a significant one? Synthetic benchmarks both. Real world users might not see much is what I read into that, but I could be wrong.
I've only run W8 in a VM, and I know that isn't as fast as it could be doing it that way. More annoying is the interface than anything else. Release time I'll probably pay the $15 to get the new Dell updated... don't like it? Ghost will bring me back to W7 in a flash.