It also depends on the person and the physical keyboard. For whatever reason I can type more accurately and faster on the iPad keyboard than I can on the physical keyboard of our netbook.

I think part of the reason is the auto correction and auto completion on the iPad, it really does mean you can be a lot less accurate but still end up being accurate. I suspect the netbook keyboard with similar auto correction would be as fast for me as the iPad. Does Windows 8 add any sort of auto correction ?