I disagree. Pacquiao conceeded to all of the terms that Mayweather demanded for the fight to happen [olympic style drug testing, 60/40 purse split favoring Mayweather, Mayweather's choice of gloves, among other things], and Mayweather was "nowhere to be found" after Pacquiao agreed to the concessions. Mayweather knows it would be his first loss if he took this fight, that's why he ducked out.