Didn't we know this whole thing was a problem 10 years ago?
http://grognews.blogspot.com/2008/09/jsf-stands-for-just-stupid-fkup.html
10 years ago? I went to my first JSF meeting in 1997 or 1998. Many of the problems that are surfacing now were obvious back then, but the answer was to drink more kool-aid.
Having said that, I will again caution against believing what you read in the press regarding its performance. There are perhaps a couple hundred people who really know the truth (and I'm not one of them any more, thankfully), and they won't be talking publicly. Just about any story you read is written by someone with an agenda they're pushing. For example, regarding the statement "U.S. Air Force analyses show the Lockheed Martin F-35 Lightning II is at least 400 percent more effective in air-to-air combat capability than the best fighters currently available in the international market" - I spent a lot of time analyzing similar results for the F-22 and know what goes into those results. There is a lot of context, assumptions, limitations, caveats, and so on behind numbers like that. One number does not tell the whole truth, good or bad.