>>149307494
Eh, their ages were floating. In OP's pic, Dick wasn't even in college yet, he wasn't 18, didn't look it at all. In The Brave and The Bold, Bruce had an adventure with Sgt Rock in France during WW2 which would have put him in his 40s in the current day. And in one of the Detective Batgirl back-up stories, an 18 year old college student considers Batgirl old enough to be of a different generation.