per ally, i can't get my kids to cut their pancakes with a butter knife and they are definately old enough, maybe if i hand them a steak knife they'll get more into it. insert Tim ALLEN tool time grunt. Someone else said they were sure they weren't handing out cleavers, but what about Ginsu knives??? I"m just being a little silly, sorry.
Montessori kids often learn cooking skills like that in preschool/kindergarten, they call it practical life. they are also big on "sensitive periods" times when certain tasks are really appealing to a certain age group. sort of like how most toddlers like to fill up buckets and dump them out and do it over and over. and helping in the kitchen is one that is pretty fun for the 5/6/7 yo crowd
I think i did let my dd help to cut an apple at 6 She always wants to do "big kid" things and was probably bugging me. She is 8 now and hasn't asked to do anything that would now be percieved as a chore.
As for you situation. I would have DS practice at home under your supervision, it would probably make you feel alot better if you knew for sure he was getting the rules down in a ONE on ONe situation, keep your fingers back, hold the item with your left and hold the knife properly with the right. keep the tip of the knife down and just life the back that sort of thing.
honestly, even if he did cut himself, i would think it would be just a little knick unless he was goofing off and being really irresponsible with it, and your son doesnt' sound like that kind of kid.