"The question is- can the young guns push Vale into making any mistakes??????????????"
Rossi has shown on multiple occasions that he doesn't need to be "pushed" into making mistakes.
I think the question is can the young guns, Sete, Colin and others make less mistakes than him next year? Rossi came out strong this year but as the season continued others matched or exceeded his pace on several weekends.
Sete seems to have acclimated to the Duc and Danny has come up to speed unbelievably fast, he might turn out to be something else.
Could be Good.