The way he was going, bearing in mind he was simultaneously spot-fixing towards the end, the world was literally his oyster. Its not even up for debate - you only have to look at Parnell who is around 3 years older and was his contemporary in the 2009 T20. He hit a stagnant period, but Amir went from strength to strength.
A wicket maiden in the first over in the final of the 2009 T20 to get Dilshan who no one had an answer to during that tournament. A Team 5 Wicket maiden in the last over against Australia in the 2010 T20. An outstanding display in Aus and NZ. We dont have to say much about the England Tour, but lets talk about the most memorable spell: 6 Wickets against England in an Innings (The same Innings which he was fixing). All this at the age of 18. Remember Wasim in 92? He was 22 at that time. The pressure he was under was bad, but atleast he had around 3-4 years of International experience. Amir was 17 when he was involved in the 2009 T20 Final, arguably under even more scrutiny due to the upheavel in Pak at the time.
Whats more, he was improving with every game. So much so, he was nigh on the complete bowler... At the age of 18! You name it, he could do it. Away swing, In swing. Yorkers, slower-balls. Leg- and Off-Cutters. Had a very good bouncer also.
He wasn't simply doing the same thing and not getting caught out. He was getting more and more unplayable with every match he played. It almost didn't matter what Wicket he bowled on, he could get the most accomplished of Batsmen out. Some of what he could do with the ball evoked memories of Wasim at his prime, and I dont remember Wasim ever doing similar at the age of 18...