How old was your DC when you stopped cutting grapes in half? My DS is nearly 3 now and I still do it. But, I'm the only person I know IRL who still does for their near 3 year old (we have a lot of friends with kids within a couple months of my DS's age). I'm still a bit paranoid I guess (I slice hot dogs down the center too). DS has never had a problem chewing anything and never choked on anything.
ET correct stupid grammar mistake (embarrassed).