I think it will. I'm older as well and I feel that all the experience I've gained through life has helped me a lot. I think that I study, remember, and reason better than I would have right out of high school. My class is a mixture of young and older, and it seems like the older ones are doing a little better with the content.
I also think that older students are a little less prone to the social aspect of school and clinicals. It seemed like the instructors were pushing the whole "lifelong friends from nursing school" on the first day. I was laughing becuase I feel like I won't be close friends with anyone in my class. You do kind of have the "misery loves company" type of friendships, but in the grand scheme of things, i.e. school, life, career, people you went to school with are way down on the list of important things.
I think younger students are great in other ways though. The ones in my class tend to be very outgoing and positive. I just finished the first block so I'll have to wait a couple weeks to see how they did, and if they passed.
A drawback of being a more mature student, I have found, is that we possible have more demands than someone right out of high school might, such as kids, mortgages, jobs, family, and other demands on our time. If you can manage those things you should be fine.
One mistake I have noticed with other students, regardless of age, is that they wait too long to change things if they begin to fall back in class. We had a lot of people going into the finals on the verge of failing, and having to get an awesome score on the final just to pass. Our school requires a minimum of 76% average on all tests. If you get anywhere near that on your first or second test, change things up. Either read more, make more note cards or flash cards, start or stop a study group. Do whatever it takes to give yourself a small cushion going into finals becuase you never know what may come up in life.
I don't know if any of this makes sense or helps, but there it is