Most Helpful Guy
A few things from a relationship coaches perspective.
Getting over someone and moving on are most often two different things. In other words, do you know that he got over you really, or do you assume he did because he was with someone else quickly? People very often move on quickly because they hate being alone.
Men do move on quicker than women because they are logical livers moreso than women. In this, it simply doesn't make sense to them intellectually to hang on (emotionally) to some lone they're not going to be with again.
Of course, buried in my last comment is one more reason. They may move on quicker because they see little to no chance of reconciliation.
Most Helpful Girl
I had some guy get over me in a fucking day, and here I am, three months later still trying to get over him.