Sasuke gaining Gated Lee's speed in about 2 weeks while simultaneously learning Chidori.
Everything relating to speed if you take part 1 seriously. Haku, as the fastest for the time, set the bar for what is and isn't fast during early part 1. Then KN0 Naruto shat on that before getting shat on himself. So the one thing I need to ask is how the hell are the likes of Kakashi even capable of fighting alongside KCM Naruto? If Zabuza, more or less Kakashi's equal, considers Haku above himself, and Haku's specialty is shat on by multiple Chuunin/Genin, what does that mean??