Yep. I did a touch typing course in year 8 which did almost nothing for me (or so I thought). I started using the home row and the right fingers per key but nothing more than that. Then in first year uni everyone communicated primarily via ICQ / irc / ytalk and suddenly typing fast was important. A year later, someone talked to me while I was typing, I looked up and responded to them and then realised I'd finished typing the sentence I was working on as I was talking. Accidental touch typing!