Right now the top WWs are shorter right now then they have been historically in the past. You have Cotto @ 5'7, Clottey @ 5'8, and Berto @ 5'8. And you also have fighters at those same heights fighting at lower weight classes like Juanma Lopez and Chris John. The average welter historically has has been the size of Cintron, Margarito, De La Hoya, Trinidad, Hearns, Forrest. Since there has been a history of 6 foot welters I don't understand how its a shock or a big deal there is one that happens to be a couple inches over the norm. but WW has the most variants in height disparity between fighters. But from 147/54 to 200 everyone is generally from 5'10-6'2.