what is the mental age of George the Lesser?

Lucky Steve Holland got to accompany him on his Saturday bike ride.

"While some of his Democratic critics have complained he spends too much time on his bike, Bush said the exercise helps him deal with the pressures of the presidency.

"'Riding helps clear my head, helps me deal with the stresses of the job,' a sweat-soaked Bush said after an hour-and-20-minute ride that shot his heart rate up to 177 beats per minute at the top of one climb.

"The president set a brutal pace for his accompanying riders, who included two Secret Service agents, White House spokesman Tony Snow and this reporter, who managed to gasp his way through the 12 1/2-mile ride. . . .

"Bush does not ride quietly, constantly shouting out in his Texas twang the names of trees and geographic features and yelling at himself to pedal faster.

"'Air assault!' he yelled as he started one of two major climbs, up Calichi Hill, which he named for the white limestone rock from which it is formed."

Dan Froomkin adds,

Yes, he actually yelled out "air assault."

I'd say he's about 10.