Trevor7, I am in a similar position - based in LA, not NYC, but definitely in the same age range - and while I heard from a number of professors that including year(s) of work on my resume would reveal my age (and could, therefore, put me at a disadvantage), I choose to do exactly that so that potential employers can see exactly what kind of "package" I am as a SM. Sure, I'm not getting tons of offers for PSM work, but I feel better without any surprises in the interview. And it gets the age-sensitive types off my list quickly and painlessly.
That said, I agree wholeheartedly with those who have said that producers who get squeamish only *after* hearing about age aren't worth their salt. IMHO, it's petty and rude - hardly inspiring.
Meg