I was just noticing your last question:
"Do the babies tend to choke or overeat?"
The answer is no to both. Babies do not tend to choke. They actually have an amazing gag reflex. Our ped told us that people sometimes think baby is choking because they will gag. But this is nature's way of helping them out. It is not something to be concerned about. Baby is still learning how to eat and learning what to do with extra saliva in the mouth. She might gag a bit while getting used to a faster flow, but that's ok.
Babies also will not overeat. Babies and kids are very good at listening to their bodies. If they are no longer hungry, they will stop eating. Adults have usually long forgotten how to listen to their bodies - that's why so many are overweight. Babies don't usually have that problem.