Since I fill up to neck (ALL THE WAY UP) I can attest to certain pumps being "kind" while others work like a binary switch - they are either off or firehosing gas out with no ability to trickle gas in. I note those gas stations, and don't go back to them. Otherwise it takes me 5 minutes to fill the car.
I'm sure the "click point" is also affected by the rate of delivery of the pump too.