The credibility of Lt. Col David Berke USMC is based on personal experience:
I had three previous operational experiences with amazing airplanes prior to the Joint Strike Fighter. My opinion of the F-35 is vastly higher than that of anything else...
The credibility of Major Morten Hanche RNoAF is based on personal experience:
I don’t make my claims based on bits and pieces of information, derived from potentially unreliable sources. They are based on experience actually flying and training with the jet for nearly a year... Personally, I am impressed by the F-35.
What is the credibility of their PPRuNe detractors based on? I think we should be told.