Jimjams, when you say "PECS is about the only thing that will work ime if your child can't imitate" do you mean vocal imitation (in some way) or general imitaion (motor, etc)
dd1 can verbally imitate anyhting. say it once, and it's there. Meaning is not bad, in her own way, and she is regularly producing phrases at a 3word level. She can request anything she wants form me, most things from her dad, and again most things form her nanny (with soem prompting, nanny is new to us). she has no motor imitation skills whatsoever.
she cannot manage this at preschool. she is overwhelmed by the noise and busy-ness, and tbh, she does not function well if she does not have the full attention of her helper (a difficult thing to achieve in a busy pre-school). SALT goes in to pre-school, and says, straight away, she needs PECS to help her communicate.
this, quite frankly is a load of b. She has tried using PECS with dd1 before. dd1 gets the concept, but does not see why she should use it when she can just ask for somehting/tell somebody what she wants. I do agree that she would benefit from the sentence build-up aspect, but if she won't comply, she won't comply.
The problem is, for successful PECS, you still need an exchange to take place, and without dd1 feeling she has the full undivided attention of the assistant (in which case she would just ask for what she wants -I suspect she is asking, just very quietly and not always directly) then she is not going to ask, whether by PECS or verbally. This is why I am so frustrated by the SALT's insistance on PECS. If they used half the time and energy in getting dd1 comfortable enough to ask (by whatever method) then they would have a child who can communicate.