Windows 8 is a souped up Windows 7 with an optional interface for start functionality. Once people get used to the interface they won't look back. I hated it for the first 2 hours of use, after that I just keep getting these very satisfactory hits of features and integration I absolutely love.
To judge it I think you need to look back in 6 months time and see what people think, it's way too early to establish a "fail" as you put it.
If the criteria for a "fail" is early adopters having issues, then surely by the same token iOS 6 has failed? So come on be realistic any new product needs time to bed in and for consumers to digest.
I just inserted my USB stick
and 25 minutes, what are you running it on a ZX81? Takes less than 2 minutes on my 3 year old PC.