Seems to me THAT SOME PAKISTANI fan boys have got really UPSET by the maiden flight of the PAK FA fighter.
For me it looks like a STEALTH VERSION of the flanker series.
If flankers are considered world class 4th generation fighters and most will agree they are ,,,especially SU30MKI/SU35
Then SURELY ,,, THE NEW PAK FA will also be world class.
For those like growler/ super falcon telling us its cheap/crap/ cant be as good as F35 '''theres a element of green eyed envy.
PAK FA will now see $10 billion of further investment development and wen in 2017-2019 it enters service in both russia & india,,,, it will defo challenge both the AMERICAM fighters.
AS FOR THE REST including J10/J17 thats NOW YESTERDAYS NEWS too old too little no USE to anybody in 2017