Man I hate when players try to get free crap for nothing. This guy is already powergaming the old-age angle simply to get better bonuses.
You should tell him, "No, you don't get bonus skill points because you didn't start training those skills until later in life, which is why you don't get bonus spells or anything. But, you do have lots of penalties to skills. Being old, your eyesight is worse so you take a -4 to spot & search. People aren't usually afraid of the elderly, so your intimidate drops -10. You also are much slower than you were in your younger days, so your speed drops by 10-ft."
I had a player that tried getting free bonuses all the time. I'd say things like that to shut him up. If he wants to dissect stats for realism, I'll have to dissect them in the negative direction also.