Two pick two teams at random since there doesn't seem to be a combined list out there:
Philadelphia:
25 or younger: 19
26-30: 10
31 or older: 4
Montreal:
25 or younger: 15
26-30: 9
30 or older: 5
NYCFCfan's numbers for NYCFC: 14, 6, 10
While Philadelphia has a few more U25s, they also have a bigger roster (33 vs 29&30).
Of the players
MagnusPax mentioned, I expect Hernandez, Wingert, Grabovoy, and Ballouchy to all see a decreased role as reinforcements arrive (both known and unknown). As an expansion team, I'm not surprised to see us skew slightly older, but I don't think it's a problem or anything to worry about. If they keep bringing in 35 year olds, sure, but there's no indication of that happening.