The problem with simulations is that they are just that. Given the immaturity of the JSF mission systems, which don't forget are the heart of the JSF's capability, at the moment they are just the best guess about what LM should deliver. Until the programme completes OT and delivers as war fighting platform a true judgement cannot be made.
Also, given that there is only one country that has a true F22 model, I highly doubt that anyone is leaking information. I suspect that the 'rumour' are nothing more than that.