re: Mayweather says he'll give Pacquiao another shot in a year

I don't disagree with that. I have no issues with counter punchers. Boxing is as known as a The Sweet Science. Being a counter puncher career boxer means you are probably one of the most technically sound and patient boxers in the world.
But I don't think Mayweather has had the opportunity to fight enough contenders or champions to be considered pound for pound an all time great. Even tho he's 48-0. It's not his fault. Besides 4-5 people he's fought of name, most of the general public couldn't name you anyone of note he's faced. And I believe most boxing experts agree with that sentiment.