Well I scored a brain age of 50. I'm 57. It doesn't test maturity though - that runs between 10-30 years old, depending on who you talk to and what kind of mood I'm in. It varies a lot, according to my wife!
I scored 37, actual age is 74. I guess when I hit 100 I'll score 50? I just got back yesterday from a 765 mile ride, I work a lot of crossword puzzles, and still fabricate a lot of stuff for the bike. Hope to keep active and keep my mind sharp for awhile yet.