Yeah, I've definitely slowed down, but it could just be that I'm out of practice. I used to have to type eight or more hours a day... well, maybe not that much, but I had to type at work, so I got pretty good at it and fast.
Now I only have to type for emails or forums such as SF, and that's not very much, so I've lost some of my speed. I can still type okay, though.
I can't type worth a damn on my phone with my thumbs, though. I tend to rely on the word suggestions that appear under the text box.