I agree with Mirewen 100% on this one.
Not to point any fingers or anything, but usually (usually, not all the time guys) the younger the guy, the more immature. If you're in a relationship with an older woman, and you're making it work, kudos to you. While of course there is a fine line, I personally believe that any couple who truly have those "I'd do anything for you" feelings could pull through. Us women who are in or above our 20s have probably had our fair share of bad relationships, so boys, think with the head on your shoulders if you plan to be in any serious relationship. That applies to all relationships, I guess, and not just having the woman be the older candidate.