DJI is inconsistent to the extreme on this important spec. They originally said 1000g, then when the h3-2d was released they updated some (not all) their documentation to 1200g (with no change to hardware of course).
When the p2 came out they listed 1300g, but then said it could be more than that with all their suggested upgrades, but if you run prop guards it should be no more than 1350 (what happened to 1300?) I think they recognize that it's a loosey-goosey figure in the first place. I say if you're over 1400g, you really don't need to be over 1400g for anything.