With the Lightning coming off two of its best games — and saying its speed, even on defense, was key — it was curious vs. the Ducks on Sunday to play D Andrej Sustr over Slater Koekkoek. Tampa Bay doesn't want a player to sit for two weeks (Sustr was scratched in five of the previous six games). But Koekkoek had earned his time.Did you see Mikhail Sergachev's slick, cross-zone feed to Nikita Kucherov in the first period? Holy moly. The rookie defenseman has special offensive skills. And he's daring enough to use them. Are we sure he's just 19?The skill on this Lightning team is impressive. So is the depth. But what's most striking during this recent stretch has been its speed, and not just off the rush. Tampa Bay is ferocious on the forecheck. The Ducks, Kings and Sharks are good teams. And Tampa Bay sliced through them like a knife.