The newest report - still secret… 
http://www.fas.org/sgp/crs/weapons/RL30563.pdf
Enjoy,
Lancer44
i heard rumours from the chinese newspaper that they already find the weakness of the F-35 and F-22 stealth ability and pentetrate it, but most likely propaganda though.
But is that true that it is hard to take it down even you can detect it?