the statement saying the f-35 is slow, cant climb or turn is just stupid, when in fact its lighter than an f-16, has cleaner aerodynamics than an f-16, and has the most powerful low-bypass turbofan engine in existance! it has an enormous thrust to weight ratio, and to top it off, these things have unprecedented situational awareness capabilities.
last week, a british test pilot flew an f-35b for the first time, and he had absolutely no qualms about its performance
http://www.lockheedmartin.com/news/press_releases/2010/100127ae_f35bf-2_royal-airforce.html.