It doesn't matter if people from Afridis race tend to age faster or quicker, the simple fact is that he is at least 3 years older then his listed age of 29/30 on cricinfo. In fact there is an interview on youtube in urdu in which he himself states that due to the Pakistan cricket structure, almost all players fake their age by 3-4 years. The interviewer then went onto ask him if that was the case then he too would be older than his listed age, and Afridi said, obviously I mentioned everyone.
Anyways as far as a test option, it would be outrageously stupid not to include this guy in the test side, this shouldn't even be a debate. He has totally transformed himself as a leg spinner in the past 3 years, yes he came on initially as a leg spinner, but this recent transformation is very significant, he never got the amount of drift he gets now, he never had such a potent quick googly, and he never delivered the ball with the seam perfectly rotating and visible.
Forget his bowling, he should make the team on his batting abilities alone, I remember a few years back Pakistan was in India and India had set Pakistan a 350 odd total to chase down on the final day with all their wickets in tact. Afridi opened the batting a hit a quick fire 50 allowing Pakistan to actually go after this total. Traditionally if you take Afridis innings out of the equation, no Pakistan side would ever in current circumstances would even attempt to chase the total down. The Indians were totally on the defensive and demoralized while he was at the crease. I recall 2 years ago South Africa had set Pakistan less then 350 on a flat track in Pakistan with a whole days of play left, and Pakistan opted to fight for a draw from the first ball on. It was pathetic. The point is that Afridi adds another dimension to the Pakistan line up, he is energetic and brings tremendous energy to the side, and he is always willing to take the attack to the opposition, with the kind of test cricket we play these days, you cant risk not having him at the top of the order opening the batting in certain test situations. It lifts the whole team up and I am all for his inclusion and also Kanerias.
peace