Hes one of the most consistent since turning face at getting good crowd reactions. But what the crowd likes never made me change opinion on my fave wrestlers, never liked Orton but at least I prefer him to hold the belt over current WHC.
He does usually get one of the louder pops on live shows like Raw and PPVs, but hasn't gotten the loudest pops in a long while... since 2010 or early 2011 I'd say. Moving to SD is probably a reason for that.
You noticed it only now? after Jeff Hardy left and the crowd naturally turned Orton babyface, he's getting the biggest pops and ovations from all the demos. Even when he's booked terribly like OTL, he still killed everybody there by far.