Well I have never had a Mac, but I share your enthusiasm regarding the speed and integration with the whole suite - works great :)
Robains, since your post was about performance mostly I'd love to hear more about your PC hardware, i.e., how you overclocked (I assume) 6 cores to 4.8 Ghz and how much memory you have, etc. I'd think everyone would have to agree with you about the speed improvements in CS6; however, since hardware might have played a role in the five-fold improvement, it would be good to hear more. Thanks.
If you'd like to discuss how to tweak hardware settings, what hardware to use, etc., please start a topic in the Hardware Forum:
I'll start a new thread in hardware area per Jeff's suggestion. It's a relatively easy process to overclock an i7 3960X to 4.8 Ghz, especially with quad channel RAM (in my case I have 32GB). I use Prime95, RealTempGT, and SiSoftware Sandra Pro 2012 to do all my stability testing at those speeds. Of course, it's impossible to overclock on the Mac side of things ... well I guess I should say "very difficult" and one needs to be comfortable hacking Apple's EFI (which I'm not).
I'll get a new thread going on the Hardware forum.
Thanks - a hardware thread is a great idea. Once there, I'd love to see which CPU heatsink/fan/cooler helped you get to 4.8 Ghz. Motherboard is an important variable too.