Aye, I think its more a sign that it's got under Fergies skin than him playing any mind games tbh.
Its obvious when you consider Man City have bought one of their best players and have arguably 5 top 4 worthy players. (Given, Robinho, Barry, Adebayor, Tevez)
And Man U have more than 5 top 4 worthy players.
Rooney is twice as good as any striker Man City can play.