Thanks for the answer,
But it still not convince me of buying a 2000$ PTW over a 1000$ AEG. Money is not an issue for me but I wouldn't spend twice the price on something that is just slightly better. If I buy a PTW it's because I'm very impressed and the performance are far better than a AEG by a Good margin.
I saw too many good performer AEG and saw very few PTW in games, but I will have to fire the 2012 version to see if it worth the investment. I might visit double tap soon...