People have been saying Zoro is too slow for speedsters. They outright refuse to accept King as a speedster, which's going to change after Kizaru vs. Luffy. And then everyone their moms highlighted and hyped Lucci for his speed as his speed along with Luffy's was highlighted when they were fighting.
Even if Lucci isn't quite as fast as Luffy if Zoro deals with his speed in base, then his top-speed attacks are up there with the very best, and his reaction speed is much closer to the likes of Luffy way more than he's given credit for as Luffy was using FS to outdo Lucci.