He won the fastest skater competition in the Oilers all-star competition when McD was out. (Including Hall)
Watch him, he's extremely fast.
To be honest, the fastest skater challenges at those type of events are not really an accurate measurement of effective in-game speed. MacKinnon hasn't done great at the fastest skater contests, yet is one of the fastest players in a game in the league. It is really about how fast you are over your first 3 strides, and ability to change direction while maintaining speed. Not to say Drai isn't a good skater now, or hasn't improved significantly. But, how fast a guy goes from blue line to blue-line from a flat start is much more important in an in-game scenario than how fast someone can circle a rink. I don't think Ovi ever did great in those things, but he'd be top 5 in the league in his prime for explosiveness over his first 3 steps, and once he turned the corner on you, it was almost impossible to make up due to his strength on the puck.
If you gave me these two theoretical prospects who were equal in everything but skating, but player A had a faster top speed, but took 5 or 6 strides to get there, whereas prospect B was didn't have a great top speed, but was explosive out of his first 3 strides, I'm going with prospect B. It's better to be quick than fast.