Well, we do know that the F-35 bleeds energy quickly in the turn, reported many times in the past three years or so. No, we don't have the SEP graphs, John, but we do know the airframe is draggy and the SEP figures not as good as they may have been. We also know that very high aoa manoeuvre bleeds energy very fast, so peak instantaneous turn is likely to be just that, over in an instant.
I think the claims made by Flynn look over-inflated to me. There are quite a few legacy types that were better optimised for rate/radius and the more recent news supports that. Maybe we'll see more results as the USMC start to put their Bs about a bit.