Most Helpful Guy
It would be hard to tell in many cases because men generally hide emotional pain (cultural expectations of masculinity, bla bla). There are people that will drop a person with seemingly no second thoughts. There are definitely people who will take a long time to recover from a relationship as well.
Side note: You can easily find an example of a person (regardless of gender) that will display a certain behavior because there are 7 billion people with all kinds of variations of the norm. The real question to ask is whether a trait is really sex-linked or there is just the belief that this is the case. If it's linked, then we can ask "how common is it for men to X?" or "Do women generally want to Y?" Nature doesn't tend towards absolutes.
Most Helpful Girl
Actually, I've found that guys move on slower. They might physically move on (start dating someone else or hooking up with someone else) but emotionally they haven't moved on.
If he didn't care, he wouldn't have dated you for 6 months.
Also, does it matter? He's an ex now and he's part of your past. Give yourself space and time, don't compare your progress of getting over him to his progress of getting over you. Everyone moves on at different speeds. For example, for a 5 month relationship it took me 4 weeks. And that was the "worst" breakup I've had, all previous relationships I was over it in about a week. I just get over relationships really quickly, but that doesn't mean I didn't care for the guys I dated. It simply means that when breakups happen, I accept it, and move on.