United were the better of the two teams. They had more possession and played the better football (just). None of the arsenal fans on here have disputed that because it was fairly obvious.
Not taking anything away from arsenal, they were brilliant. Like I said, it was game of the season so far (but then it usually is).
Only thing that separated them was one fairly lucky goal.
If both teams had took all their chances the scoreline would have been something like 5-4 to Utd.
Utd always go out and attack Arsenal when they play them, with varying results. The next time Utd play Arsenal at the emirates, they will go out and attack them.
Personally, I wouldn't have it any other way.