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The download was quite fast for me, got the ISO in about eight minutes.
I gave the preview a try and can't get it to boot on my machine, nor in a virtual environment. I tried both QEMU and VirtualBox with no luck. I get the fish logo thing and then an error saying the machine needs to be rebooted. I checked with a friend who got Win8 running in VirtualBox and confirmed we have the same settings (memory, processor, video, etc). His works okay and mine dies. The checksum on my DVD is good, so I'm not sure what to make of it. Windows 7 runs okay in the same environment, so it seems to be an issue unique to the Win8 build.
It's not a big loss for me personally as I generally use Linux as my main OS, but I was hoping to see what I'd be supporting at work in the future.