Sorry, Doc, but that's a popular misconception!
Certainly the dampers reduce the speed of lift of the pistons, but the reason for that is that if they fly up too quickly, depression across the choke is lost and far from having a mixture that's too rich, you have one that's too lean. Fuel won't be dumped down the throats, it'll barely struggle its way out of the jets, even though the taper of the needles means the apertures are enlarged. Just the opposite of what you wrote, in fact. Ivandyke got it right in his post.