My husband is in the military and was taught at boot camp to eat in 3 minutes. Yes THREE MINUTES. He has slowed down some in the 20+ years we've been together. But he still inhales his food. I sometimes ask him if he even tasted it he ate it so fast.
I on the other hand am a slow eater. I have issues with my teeth so have to take smaller bites. But I also ENJOY food. I like to SAVOR it. And always have. I was consistantly the last person at the table at meal times. Sometimes by more than half an hour.
My kids ... 3 kids ... 3 ways of eating. My daughter is a grazer. She can't eat large meals most of the time (although now that track has started that will change some), she eats little bits here and there and LOVES LOVES LOVES salad and veggies to snack on. I'm good with that. Her height and weight are great she's thriving as far as her health goes and she's A's in all her classes except 1.
My oldest son eats more like I do. He takes his time most of the time and savors the food he's eating. Course he's also almost 19 now and not wolfing down food like there's no tomorrow now that he's stopped growing LOL. When he was going through growth spurts ... good grief that boy could eat. Although he still never ate as fast as his dad.
My youngest son ... well ... we have to monitor him a little closer. He'll wolf down his food so fast that he'll go back for more till he makes himself sick. He eats more like his dad and I'm trying to work on that with him. To have him slow down a little while he's eating.
I don't put time limits on meals though. When they are full they are done eating and they are welcome to stay at the table and chat (because I'm STILL the last person sitting at the table 99.999% of the time LOL) or they are welcome to rinse their plate off and put it in the sink and go on about their day.
Good luck with however you decide to go.