Hello - quite new to this board. :-) DS2 is 2.5 and newly diagnosed with ASD though we've viewed him as probably on the spectrum for some time. DS1 is 5 and not on the spectrum. I'm breastfeeding DS2 (fed DS1 for 2.2 yrs) and though we 've dropped a lot, he still wants it at least twice a day - depends on what we're doing, where we are and how distracted he is!
I'm not opposed to feeding him for a fair while longer, as he's obviously a different kettle of fish from his brother, and he gets a lot of reassurance from bf. It's also one of the few things he responds to if I suggest it (ie. If I say the word I use for bf, he will generally drop things and come running, but will effectively blank out most other suggestions.). What I am wondering now is how easy it'll be to drop it, and even if I want to drop it. I don't have issues with bf him for longer, nor doing it in public if I need to, but have been wondering if it'll help him with 'socially acceptible behaviour' - he has been known to stick his hand down the tops of women he knows well (my mum, a friend) and have a rummage! 
I'm interested in hearing about experiences of bf a toddler (or older!) with ASD, and if there are any tips about stopping it gently.