Um what the, they have to be joking with that surely or this developer knows jack about pc specs.
Well, a while back I did a test to see how much of a frame difference there was on my i7-4770k/980 Ti between Very Low and Ultra, and it was about 20 fps.
I'm guessing what he means, is that a 1070 should be running at 40 fps Ultra in the worst spots, and 60 fps Very Low in those same spots. It's not unheard of for the newest games to drop to 40 on the newest mid-high end cards (yes, no matter what they look like) in the most demanding areas of the given game.
At least, I hope that's what he meant. He doesn't appear to be a very good communicator, and it is Twitter after all.
That said, yes, the preset scaling is very poor.