I agree with this, but from a different stand point / reasoning.
Let's see if I can make this compute..when I get a cylinder head that starts to go turbulent in a blippish way ,not full-blown diving into 20cfm losses... i will flatten my hand out in front of the radius at the floor 'like bridging' and if that number jumps 10+ cfm... in my mind the intake will take care of that. If I can't get it to settle with my hand...i dont bet on the intake fixing that and so i keep working the port..