He is definitely in top 3 P4P right now, along with Jones and Aldo but is he no.1? I don't think so.
On the other hand Jones almost (some think did lost to Gus) and Aldo did show some weaknesses so he might, just might lose some fight down the road while Barao seems like there is nobody who can beat him (weaker division? maybe). Time will tell but right now its just DAT promo by DFW