I've got two DSs, both diagnosed with ASD, both batting well above their average academically. It does get better, I remember DS1 being described as naughty when he was in year 1 just pre diagnosis. He was on the lowest achieving table, basically being written off. Then he came up dually as having a really high IQ and ASD, things were put in place to calm him at school and by the end of year two his reading and comprehension levels were that of a secondary school pupil. He's now mostly on level 4 scores (apart from handwriting which continues to be a problem) in year 4, despite being one of the youngest in his year.
My other son had pretty much the same thing - got to school still not toilet trained despite years of our best efforts. Couldn't write his name by the end of reception. Was diagnosed with ASD and dyspraxia, has had help and support and is now rapidly overtaking his classmates and set to be similar to my eldest.
Purely from a subjective point of view their attention gets much better and as they do well at things they seem to become more motivated to do more. They are slowly learning social rules, and I feel confident (except at 3am sometimes
) that they can both have good lives and go to uni, have families etc. Having said that, they are totally disorganised and literally can't tie their own shoelaces, but we're working on ways to get round that.
Have you tried the NAGC website, they have somewhere on there ways of telling the difference between someone on the spectrum and someone who's got "high learning potential", but they do often seem to come together.
I totally recognise the change pre and post kids btw, I used to be laid back too, but as they get better at coping with the world (and the world at coping with them) I am slowly starting to get back to being myself again!