One thing I can tell you is I have a custom/pro-fitted bike, and when I am on the hoods, the bars eclipse the front hub. I suspect it would be similar on the drops, since the reach is supposed to be similar (adjusting for angle of attack). However, I think I could change the stem length ± 20mm and it would still work, so it isn't a high-resolution solution. Also, I think it falls into one of those "coincidence" tricks, like KOPS, rather that being based on some fundamental principle of physiology.