Where's the proof? Admittingly, I've never seen this guy fight....just watched him get his ass handed to him against that nobody...
he's fast as hell, but there ain't much power there to keep anyone honest. reminds me of calzaghe in that respect. he's gonna have a lot of trouble against anyone with a chin/good defense who packs a punch. all a fighter really has to do is shell up during one of those flurries/combos and wait for an opening to land something decent on that chin of his.
That's beside the point. The fact is, Pacquiao having been in with top guys at the lower weights, has stated Khan is the fastest guy he's been in with. Other sparring partners have said the same thing, even Roach himself said he matched Manny with hand speed. Although he can bang abit, Khan will be more renowned for his foot movement and quick combinations, as oppose to a KO artist.