the good show against ac milan gives one reason to believe that the gunners are not about to crack under pressure (of winning the title) and they may actually have sorted their internal problems out.

I would not be so quick to start putting the Arsenal colours on any silverware just yet. The win over Milan proves only one thing and that's just how poor Milan have become in the last season and a half. I think Arsenal are getting carried along with the glory that is the first english club win at the San Siro, and everyone is overlooking the lackluster performance of the Italians.
Arsenal have still a lot to prove yet, and there are big questions to be asked of them in the coming months.

well, you are a utd supporter and the way they played against lyon gives gunner's fans reason to be optimistic. the gunners played well though still not up to their high standards and it is only a step in the right direction. if they had choked against ac milan utd would have capitalized but now it is still anybody's title.