From the DE 
sub, they seem to be having fun debating over this. Bush as "reaction speed" is incredible 
INLAND EMPIRE [Trivial: failure] โ Oh, it's focused. I'd say it's-- I think it's-- I-- I haven't-- look, I have trouble even mentioning, even saying to myself, my own head, the number of years. I no more think of myself as being as old as I am than fly. I mean, it's just not-- I haven't-- observed anything in terms of-- there's not things I don't do now that I did before, whether it's physical, or mental, or anything else.