Oh yeah? Try this on for size... In FF7, in the booklet with Vincent's age, it states that he's 27. But the events that happened to him was like 30 years ago. But as it clearly shows in DC, Mako tends to stop aging as we've seen in some characters, but also add an additional 3 years to that.

So according to all that, Vincent is about 60, but still has the vitality of a 27 year old.

Chew on that.