If Floyd went down to 130 or to a lesser extent, 135 again now, he could have some problems with stamina etc... but I still say he would easily have enough to beat the likes of Pacquiao and Valero.
Floyd was talking about if he had stayed at 130 though and waited for Manny to get there. I have no doubts he would eat Manny alive in that scenario... not a 3 round job, but a bad beatdown nonetheless.