That sounds silly to me. As long as you keep your arms tucked (elbows back) you can go as low as your body will let you. I go until my hands are pretty much in my arm pits.
Another big thing though is keeping your legs tucked up to your abs. This makes your torso face more towards the ground and keeps it a chest and triceps movement, while also keeping your shoulders from getting in a bad position.
Current PRs at 242, raw w/ wraps- 525, 355, 605, 1485
Roboro tui, perimo vester adversarius
(Build yourself, destroy your enemy)