Thank you so much for all of that info Shioban!!
Everything you have said above, we do. All of the language modelling and so on, like with the biscuit example, the tugging me to go places and what not. Generally, his reaction is to freak out - either cry, screech, or throw a fit. Grrrr.
The example you gave me about the boy who you went to play with is where I think we are now. That he needs someone to tell him there is a new expectation for communication. We don't have anyone else, really, as you know, which gets me in a bind. He does need a "push" but I'm wary of pushing too hard and it backfiring...it's trying to find the "right" thing to do, and I'm not sure what that is. You know?
I know boys often talk later than girls, and that many LOs are not speaking by 18 months, and all of that. But there is also a gut instinct in me that tells me it is MORE than that. Part of it is his total addiction to signing, and also there is something about the look on his face when we are encouraging him to speak and what not. Like he totally shuts up shop and is being VERY clear that he wants nothing to do with talking. He makes no attempt whatsoever to make sounds or noises.
OK -- actually, there is ONE thing he has started this past week, and I don't know if it "counts" or not (pardon the pun). He's started counting, but only by saying "uh, uh, uh." For instance, put his toast on his tray in the morning and he points to each one and says "uh, uh, uh" as if to say "1, 2, 3!" But he also might be saying "same" - because this is the same thing he does at dinner when he is having the same meal as us: points to his own and says "uh" and then to DH's and says "uh." So he points and says "uh, uh" ... so he could very well be pointing to his toasts and saying "same!" That may not sound as clear in writing as if I could demonstrate. This is the ONLY attempt at language he has made. And perhaps because we have never taught him the signs for either (same or numbers)?
I don't know, it's just something in me that feels it's MORE than being a boy who isn't ready to speak. I feel like there is something else going on.
Receptive language skills are great. I did some reading on how some LOs appear to know what is going on because they know several nouns and you think they understand but really they are only getting a key noun. We've paid a LOT of attention to what he is understanding and are often baffled - I'm sure other LOs understand as much as he does but because he doesn't speak, it makes it seem like it's more. The other day I turned towards DH and said "his car garage is dirty, remind me to wipe it when he's napping" - did not say it to DS, did not know he was listening, he was on the other side of the room. He ran into the kitchen and got a towel and got his garage out (we were not playing with it, it was near his toy box) and started wiping it off. I've got loads of examples of that kind of thing, which makes me believe his receptive language skills are spot on. So afaik there is no issue there.
Anyway, lots of rambling...but you seem to have lots of experience with this and really value your input!!