Not if you're one of the kids who gets recruited to a team. If I were 20 and suddenly found myself training with Oracle, I don't think I'd be telling myself, "aw, shucks."
Oracle doesn't have a stable of 19-23 year olds it's waiting to unleash upon the Red Bull Youth America's Cup... The Oracle brass can't just call up it's nieces and nephews in Australia and Kiwiland to pack onto their boats. It's got to recruit local talent, and they must be U.S. sailors (citizens or long-term residents, item 5.4 in the RFA). And since the U.S. will be unique in having not one but 2 teams (counting "Team San Francisco"), that's twice as many opportunities open to U.S.A. sailors.
I don't think that's too bad at all.