I know a lot of people out there don't like or trust Carlo Kopp's analyses and think he has an agenda, but he knows his subject and does his research. I haven't seen many challenge his facts, only his conclusions. In which case this paper reveals a lot about the capability of the F-35 stealth against double digit SAW systems. 3 years old but the design hasn't changed.
Assessing Joint Strike Fighter Defence Penetration Capabilities