Hmm, based on my revised interpretation of what constitutes "apex," after having read this thread a while back, I would have thought surely today's would constitute below parallel:
Interpretation of "apex of crease of the hips" for judging depth.
My problem with getting much deeper than that is my affinity for the wide stance. Taking a wide stance helps me keep the knees out and get a good bounce from my adductors. If I go to shoulder-width my knees might as well be balls-in-sockets rather than joints...