I think you're overselling it somewhat. I've tried the swype systems, and I always devolve to just tapping. Same with my friends that have access to it. Out of 4 of us, all of us hate swype based systems. That's not data, obviously, it's just an anecdote.
I think the GP is overselling it a bit too, but I've been using the standard Android keyboard for a bit now, which includes swype-like typing, and I'd have a tough time switching back to just tapping. It's substantially faster and generally as accurate as tapping and quite a bit better than any miniature hardware keyboard I've tried. I don't know that if it wasn't built if I'd have bothered downloading Swype or Swiftkey, but it's nice to have the option.
In some ways, it reminds me of the difference between Newton HWR and Palm Graffiti; you had to learn some new patterns to use Graffiti, but when you got used to it, it was light years ahead of the performance of the natural handwriting recognition of the Newton.