Seems his scheme calls primarily for two-gappers with a microscopic bit of pass rush ability thrown in, but not a whole fuck of a lot. I think the Chiefs have a few guys better suited as one-gappers, but eh...
There doesn't seem to be some constant to pin your hat on either.
I think what you'll see below is a bunch of baseline guys with 33-34" arms that happen to have decent acceleration off the ball.