Had a friend (who's 31 and married) tell me that he's getting more attention from women now (at 31) then ever before.
Not trying to brag, but I'm tall, good looking, in great shape from busting my ass in the gym, and still get rejected left and right. And a lot of the time it's by an older(ish) woman because of my age! They just don't take me seriously, don't think I'm "mature" and don't think I can handle something serious(or serious-ish). I was actually just recently out on a date with a 28 year old from OkCupid.. We had a pretty good time. The next day I texted her saying it was fun and we should go out again, her response was "maybe if you weren't 21. The age gap is blah blah blah for me."
Women THINK and BELIEVE that men who are older are more mature, which is hilarious because it's completely wrong most of the time. Your personality (at least as a man) doesn't change too much. My dad's 73 years old and is less mature than me! Seriously! Same with his old highschool friends! If you're an X, Y or Z at 21-25, most likely you'll be an X, Y, or Z at 30-35. Women think differently. They always think people change or can change (I.E abusive relationships that women stay in).
Simple answer: Yes, being older helps. But if you have a good job, make good money, and are independent, you'll have much better success - at any age. Being in college, living with parents, and not having a job is a HUGE put-off for women who are 25-32 (those "omg I need a man/husband ages).