Yeah, i once gave a emacs introduction in school and people asking me how i do X, Y. I needed to watch my fingers to tell them.. that was a bit confusing ;)
But I don't get this with Vim. I think it's because Vim is a kind of composable language, so although you don't actually know at the time what you're doing, if someone were to ask you how you deleted half the line so quickly, you can work it out: "f)dt:". I think this is the reason I have trouble learning Emacs: it's not so obvious how commands are composed. There are some chains like C-h which are, but for the most part it feelings like there are just too many pieces. I've given it a good shot, and I'll probably try again, but it just doesn't feel as easy as "'d' to delete".