Today DS, who is 4, had a playdate with a friend's kid, who is 5. He was really excited.
But, the whole time there, the kid wouldn't pick anything to do that DS likes to do. All he wanted to do was make toys "fight" each other. He talked nonstop about fighting, killing, shooting, and dead guys. DS isn't used to that kind of play. I kept gently trying to steer to other activities, but this kid would have none of it.
I didn't push too hard, since it wasn't my house, but it was frustrating. The mom even let her son play his 30 minutes of allotted video game time AND watch tv while we were there.
I just found it a bit strange and frustrating. My DS had been so excited, and left very confused.