moses, 2 5/8" to 2 3/4" is about right for me on most guns, too.
Drew, I'll bet that pic from Monte Carlo was posed, and not a pic of actual competition. I've never heard of an event where two guns were shooting pigeons at the same time. Cyril mentions nothing in his great new book about that, either.
Remember that, unless a shotgun has a parallel comb, the drop at face will increase the longer you make the LOP. I have many guns that didn't have quite enough drop for me until I added 1/2" to 3/4" to the pull. That, effectively, moves your cheek farther to the rear which increases the drop. Adding a Kick Killer leather lace-on pad, with 1/2" thickness of pad, has made the difference for me on many guns.
All my best, SRH