He was most excited by Stoner's championship??? Read the quote about the highlight of his career.... I guess 2 WC's from MM are nothing big...?? http://www.motogp.com/en/news/2015/11/23/honda-bid-a-fond-farewell-to-casey-stoner/190375
Context! After six years of no Championships - one can say a career was on the line. Maybe. Just, maybe!
You're reading too much into it. He didn't say it was THE highlight of his career, he said it was A highlight.
Honda was pretty desperate not to end the 800cc era without a championship, and Stoner made sure they ended with one.
Nakamoto San said Casey is the fastest rider he's ever seen. He might like him just a little bit. They probably shoot stuff together I bet.
Hey, "I'm with stupid." They had gone a four seasons without a championship, and that made it pretty sweet.