It's typical for here, but not for the world in general.
Do keep that "his language makes him seem older" thing in mind as he goes on. It becomes quite a disconnect when you start thinking, "how can you read everything in the house but can't tie your shoes?" or "how can you know your multiplication tables but not ride a bicycle?" You have to stop and realize he's only 2, or 4 or 5, and just because he sounds like an adult, that doesn't mean he won't throw a hissy fit if he gets a drop of water on his shirt, or his blocks are out of order, or he doesn't want the ketchup touching anything else.
However, a child who sounds like this and keeps sounding like this in front of other people is much more likely to get accommodations in school than one who keeps it to himself. It makes it hard not to notice that he's quite different.
