10 years of PCs also made me a touch typer lol. And same, I wouldn't remember where all the keys go by heart lol. But you see, if I put a few keys in at a time, I'll be able to find out in my heart if they're right or not. You just get that "instinct".
I can't seem to type as well with my eyes closed, but staring at the screen and typing is a lot better.
It's all muscle memory.
Chris