Make no mistake, Pac-man was awesome against the Golden boy, but there was something badly wrong with De La Hoya- he came in under weight, for a start, and then only put on 3 lbs before the fight. That means he went in badly dehydrated. From round one, his legs were stiff, and his mind was not in the ring.
Its easy to look good against a punching bag, and thats what Pacquiao did.
As such, I dont think it is fair to use that fight as a barometer against a potential Mayweather clash.
i am however, salivating at the prospect of Hatton v Pacquiao. With Hatton already showing great improvement in defence and head movement after only 6 weeks with Mayweather snr. and outboxing Malignagi so comprehensively, he will be a real challenge for Pacquiao.