I can't see the last image from the book OP?
You know my issues with ds1 however I have to say just after he turned 4 something switched. It's like he naturally went through a development phase, his speech improved and so did his behavior.
Were still following through with the paed's recommendations to get hearing/speech formally assessed. If that doesn't reveal anything when we check back in with the paed in a few months I will be discussing other options such as further testing of courses I can do (I'm sure the paed will be able to help). I suppose my point is I went with a paed at first as I didn't know whether the core issue was medical, behavioral or psychological.
Hang in there xx