I have a 17 month old and a couple of people always remark that they think she is really advanced. I honestly don't think she is though and I'm looking for some back up that she really is just a normal 17 month old! If anything I was worried because she doesn't have much speech.
Firstly she doesn't talk very much, she has about 15 words - this is certainly not advanced, is it! I know 13 month olds that say more than that.
The things they think are clever include: She knows her numbers 1-10, her body parts, shapes, animals and things, and counts on her fingers, and she knows most of her letters. Things like this I think are just because we've shown her, (she wants to do it I am not making her!) not because she's some genius! She understands loads (eg someone said "you look smart" and she pointed at her jumper).
She can follow quite complex commands/suggestions I suppose. I feel silly writing this down, it's nothing like I would call advanced but I really haven't a clue!
Thanks