It's really irrelevant because DB shoulder presses can be cheated even when you think you've got perfect form.
If people would perfrom this exercise like it's really supposed to be done, most of these poundages would be cut in half at least...straight up and down, lats tight for support, shoulder blades together, elbows back, all delts, no upper chest for help, a complete stop and pause at the bottom to eliminate momentum, a squeeze and slight wrist pronation at the apex, slow and contolled on both eccentric and concentric...
It takes concentration but you can actually find the right groove so that you feel it in your delts ONLY. If you're doing it that way, it's not a motion condusive to moving tons of weight.