That was a big point of controversy with my childhood school friends, actually.

I was firmly part of team table spoon. Some of my friends would use teaspoons. I always regarded that kind of strange behaviour as first sings of psychopathy.

No one I know uses dessertspoons for every day use. Maybe some own some but it is most likely the fancy table silver kind of thing that will only get used once or twice a year.

Personally I have never heard about them before today.

A cereal spoon, obviously.

So this actually came up recently for me. I wanted to get spoons the same size as the ones I used as a kid to eat cereal, so I ordered some dessert spoons. Turns out, what I actually used as a kid was a teaspoon. My wife was confused when I said the dessert spoons weren't the right size though, since that is the size of spoon she always used to eat cereal growing up.