Long-term Blackberry user (and I still have a Blackberry Key2) - Yep. I can type out entire grammatically correct paragraphs without looking at the phone at all. That muscle memory was carefully honed in the late 2000s high school classroom!

It's only if I get into the infrequently used symbols that I have to check what I'm typing.

In a quick online typing test I get around 60wpm/300cpm (characters per minute), 0.0% errors.