Margarito has only recently been considered a world class fighter. He would of had no chance of landing those fights in the past. That isnt to say he would of won, i have no clue whether he took a while to come on or has always been this good. Still, now that hes getting some recognition he notices he can call out someone like Mayweather and thats why hes doing it - he wants his payday and a chance to prove his worth to the world.