According to Rocket,it is just the opposite.
A larger cut head requires faster speeds so it will fly open quicker.I quess it could be described as springing open.

I do not know if this is the reason for sure but it seems like I read it on their site.
Arthur did a poll on here a couple years ago asking about the success of mechanicals and although the poll was a small number of people,it seemed that the people with quicker setups had better results.