I've just watched Pacquiao-Barrera, and all three of his fights against Morrales... and I've watched some Gernaro Hernandez and Corrales vs. Mayweather and some of his lesser opponents... Anyways from what I saw Mayweather hits pretty close to as hard as Pacquaio at the weight and IMO maybe even harder considering how many fewer punches he throws to get the same result... I think that Mayweather's power is among the most underrated things in boxing. There is a reason why guys like Castillo and Baldomir couldn't just walk straight in against PBF, and that though there is no way he could KO ODLH I believe he could keep ODLH from just walking straight in through all his punches.