As a man who just turned 30 and who apparently joined this board when I was 20 (holy shit), I can definitively answer that yes, many girls will see guys in their low-to-mid 20s. Obviously there are exceptions, such as Jess, and if they made age restrictions clear in their ad then I didn't bother them.
It would benefit you to amp up the friendliness and respect factor in your text messages if you haven't already. I've always been 100% respectful by text and in person (perhaps to a fault since I've always been afraid even asking for things will offend them) and I'm naturally shy in person which probably lowers their defences a bit. I mean, this stuff probably applies to ALL ages, but especially for the young punks.