I'm equally concerned about age from the opposite, younger side. I think the bottom line is, at the end of the day, if they love the play they'll take us, if they don't they won't. Could age be the determining factor in choosing between two equally qualified applicants? Maybe. But so could ethnicity, gender, sexually orientation, or anything else in our personal or socioeconomic background.
Only thing to focus on then, is our faith in our own talents and the courage of our convictions!