yes!!! I have been in games where I think - ok, I'll spend half an hour or an hour on this game before I head off to bed or out or whatever, and 1 person always wait until the last few seconds to make their move.
So instead of making a move a minute and getting done, everybody has to wait. So it drags out into eternity, and is especially boring if it is a 1 on 1 speed game. You don't want to just quit and give away the points either, although I have done that a few times because I couldnt stand to wait another 30 min to make the last 6 moves.
This is usually because that person is playing several speed games at once.
Speed games are supposed to be FAST, not a boring wait.