It is called self affirmations isn't it?
He is right though, I also think, that instant success is not the norm but more the exception. On the other hand, using that phrase hints a complaint about impatiency. And I think, that doesn't fit here. Lets pretend the unthinkable happens and we have to go for a new coach and we chose for example Potter then I am more than happy to give him 2 years. All he needs to do is show some signs that it is worth giving him time and that he isn't out of place in a top club (something Moyes unfortunately failed at).
I agree with the Ole supporters, Ole showed very good things, but picking players and creating a good atmosphere are things the club should establish, even guarantee to some degree, no matter who the manager is. Ole seems to have been the right man at the right time to push the reset-button. He helped to re-level the playing field, now he should be evaluated just like any manager at a top club would. He earned himself the right to be compared with them
The good thing is, I have a strong feeling that the majority of fans agrees with that stance. Not knowing him as a person but I have a slight suspicion even he would agree with that.