IBlame I have had a number of SALTs. I'm sorry to be rude about your profession but I have not yet met one who has made any difference at all to ds' progress.
The problem I believe lies in the lack of understanding and training in autism. Where you may be lucky to get a SLT who has some experience the assumptions are generic 'he has problems generalising' (ds doesn't) 'he is a visual learner' (ds isn't, in fact visuals interfere with his auditory processing and confuse him) 'he has no imagniative play' (he has loads, although possibly not at the level of his peers).
Then follows a whole load of solutions to things he doesn't have problems with, and predictably progress is slow.
I'm not blaming the SLTs as a whole. Resources are finite, parents cannot just be believed because they 'say' their child isn't a visual learner, but I am a bit cross at the reluctance to engage with me or even acknowledge potential learning.
So, not wanting ds to fall behind any more I've decided I'd better just get on with it and attempt to address the issues myself.
I don't think you rude at all. I think you are an asset to your profession for questioning and challenging.