No they aren't. How can you see 31 and 22 as remotely the same? Unless the former is retarded. That's a bit of a big difference in mentality imo. It's more so than biggers gaps among more mature people I think. I don't know what the levelling off plateau is, where the gaps mean less as you get older but 22 certainly isn't it. Not by a long shot.

Although as this case shows, you get childish kids of all ages.