PC Mag did this speed test comparison between OS X Lion and Windows 8 Developer Preview. The test was done on a Mac, for OS X and Windows using Boot Camp. This is not by any means conclusive, as Windows is still in Beta, but from all the results, there is one that jumps out: Why is it that Windows stil takes 16 seconds to shut down? First time I saw a Mac shut down in no time, I thought it was broken (Linux also shuts down very fast), I was so used to my PC taking forever to shut off.
