That's a tough vote because I feel many people are liars independent of their gender.
As far as women sticking to you more now, that's also a tough one. Excluding pheromones, I personally feel as though it's YOU, not THEM. This is a phenomenon that happens to many people. I tend to think it's because you're more laid back and non-threatening when you're in a relationship. You aren't trying to meet or impress them, you're just you. People subconsciously pick up on these small subtleties and are more attracted. Or at least I believe.
I'm less likely to talk to good looking girls when I'm single than when I'm in a relationship. I feel more threatening and tend to find them less receptive when I'm single. Of course this probably is mostly a matter of my personal perception.
That's another thing, maybe it's just your perception?
And by "you" I don't mean you personally, I mean the person I'm talking to.....yadda yadda yadda.
I had to vote women because I'm a guy.

But I'd have a hard time truly voting one over the other. If you narrowed the poll, though, I could. For instance, if the poll were "who lies more to their friends" I'd probably vote guys if you count extreme exaggeration to be lying.
b