Re: NEW AVENGERS #51
I think this indicates, along with what has been said in New Avengers, that Mephisto's mass mind wipe hasn't changed certain fixed points of continuity, like the Green Goblin knowing Peter's identity rather than him subconsciously remembering his devils' bargain.
Also, Johnny didn't exactly like Peter Parker before he revealed his secret identity to Johnny. He was jealous and a bit petty.