I don't think Nail is fast enough to do much with speed. Every time I see him in the neutral zone or defensive zone carrying the puck, he is forced to pass the puck. He doesn't move very quickly with the puck, and when he has it he seems to skate only in a straight line. I also haven't seen him try to deke past defenders either. He's quite average at offensive zone entries. I've only seen him score one breakaway goal, and I rarely see him generate opportunities with speed. Most of the time, he's either looking for rebounds or one-timers.
I don't think he's necessarily fast. He is fairly agile. He pivots well. When he played with Ales Hemsky, it was quite clear that Hemsky was much quicker.
I'd like to see him develop his possession game. He is not a very interesting player to watch. He really has to work at it because, as it stands, there's not much there. He stands still in the offensive zone and has no rush game.