I'm in the market for Windows 8 tablets and hybrids so I do keep an eye on things. There certainly weren't five Windows 8 tablets that you could lay your hands on at launch.
When did this become about "at launch". That was months ago everything is always in short supply "at launch".
If anyone wanted a Windows tablet leading up to Xmas,they could have got one, and they had some to choose from. The reality is not that many people wanted one.