Having said that I think your advice has merit. Certainly, it is likely true that for many kids, the Santa Claus fantasy is blown by other kids, and it would be well to be prepared for that.
I thought that's how all kids found out. I can't remember exactly how I did but I think that's what it was. It just helps create a bond between you and your peers when find out together. :)
Sheesh, people making such a big deal about a little fairy tale. I'm not speaking of you, just several on this thread. Leave the poor kids alone, if they wanna believe in Santa, let them. It doesn't hurt them. I'm sure I believed in him for awhile, my kids did for awhile. It's such a little thing in a big world of hurts, let them have a little fun.