He isn't too old. How old someone actually is has to do with their overall health, if they exercise and have through out life, if they have a career and interests, new challenges, lots of family and friends that are in their lives, and many more other factors.

Ron Paul would come in at about 50 on that scale.

He exercises an hour a day, swims, bikes 20 miles at a time in Houston heat, and would probably run circles around you, physically and mentally. He led a two mile march to the Fed, and led it two miles back to the start point.

Smart people don't find him old at all. We find him to be energetic, brilliant, experienced, and the only man for the job.