Yes, but also take unto account the flatter, inward bulged, wide belly of the F-35. The F-16 has a round belly, not very optimal to generate lift. That is why it badly needs the Lerx imho, since its wings are not that big either. With current computers they can much better calculate the forces and flows that occurs in a multitude of flight attitudes then what they could in the 60ties, I guess. I'm not so sure, eg, that the Lerx is that effective when the aircraft is in a sideslip.