They are top of the league for now yes, so if you simply wish to look at it that way then you can.
An easy comparrision simple stat wise would be to say last season we weren't a worse team with Matt at QB as we finished 11-5.
Fact is, we were nowhere near as good without no 12.
Man utd this summer had to sell their best player and have been unable to invest in the squad in any way due to the financial restrictions in place. What you now have is a team with a squad that lacks depth in key areas- goal scoring and at the back, who have looked poor on several occasions, Sunderland and Burnley being real examples. They have been lucky in several other games, Arsenal, own goals in that game and against Sunderland to save them a point in a game at home that they should win comfortably. They got 3 points in the derby 6 minutes into added time, when added time was meant to be 4 minutes. All of this isn't clear from a league table
Over the piece they may well still win the league, any injury to Rooney and there is no way it happens, but the bottom line is their team is not now as good as it was, or as good as they would expect it to be as they do not have the funds to buy the quality of player they are accustomed to.
Simply saying they are still winning so the Glazer impact isn't real is imo factually wrong