That's a hard subject for me. On the one hand, when I look at people in society in general, I seem more mature and wise than when I was younger.
The problem is, I think I'm slowly becoming more self-honest, and I see so much of how I relate to the world as not a whole lot different than when I was younger. These days I'm really seeing my life as a series of desires, which are just as hard to let go of as they were 20 years ago. The difference is I can see how illusionary the satisfaction of desires is, and so I don't put as much stock in satisfying them as when I thought they were "real". In that sense, perhaps there is a bit more wisdom than in my youth.
I think most people would say they are more mature and wiser. I don't necessarily think it would actually be true. For example, I would imagine some people would see maturity as being more responsible, as in working hard for the good life, instead of partying and living only for the day. But to me that's not necessarily maturity, but more just a different set of desires for a different set of circumstances.
But hey, what do I know?