To be fair to the op, she said a low IQ in terms of emotional intelligence - so EQ?
I think having a child with disabilities, and listening to people in rl and on mumsnet has made me more aware in public places, of giving people the benefit of the doubt. You see so many posts on here where children are judged for making a mess, making noise, being in a buggy, being shy, being rude etc etc...then there are the numerous parking, disabled toilets, seats on buses threads....and lets not forget the 'naughty' children at school. It goes on and on.
I know that at the moment ds and I are lucky, he is small and blonde and baby faced and quite frankly very cute. If he doesn't talk, or starts crawling on the pavement, or has to sit in his buggy or screeches people just think, 'ah bless'. I know that this will get harder as he gets older, and yes I hope people will have understanding and just be aware that disabilities can present themselves in many different ways.