Personally, if two people are dating I'm not going to begrudge them an age difference. There are a lot more important things in the world.

Personally I would never date woman to whom I was separated by that wide a margin. For example, I was just talking to a young man out on the floor and he has never seen the original Cannonball Run. When I made a reference to Barbara Bach and the Lambo, he had no idea what I was talking about. "You wouldn't have a a license in there for me would you hot pants?" It seems like such a huge age difference makes some communication ... awkward?