The guy also told me the clean weight to be around 19~20 tons, funny or not. If he's right about the sustained turn rate, I think it's safe to assume that the thrust-to-weight ratio is lower than the F-16, which in parallel means higher Lift-Drag ratio.
Months before I was told by some AF guy that the subsonic sustained turn rate of the previous J-20 prototype is pretty much equivalent to that of a F-16A or 16C blk32, even with such a low thrust-to-weight ratio. That's pretty much out of my expectation.
Hi. If you're interested in F-16 systems, especially weapons & avionics, go search for MLU M1, M2, M3 pilot manuals, which are all available online. You'll find some good read about GPS/INS weapons, LINK16, HMCS info in MLU M3 manual.