My experience with my son was that he did have many asthma attacks while he drank milk...he also had many meltdowns...Once I took away milk, his asthma attacks have been greatly reduced (close to 0 per year) and his meltdowns also were greatly reduced. However, these were not reduced because after having one glass of milk he had a meltdown...and once he didn't have milk he didn't have one, it took about 3-4 days of completely removing cassein (the milk protein) from his diet to start noticing that he was no longer having the meltdowns...The same thing happened with the asthma attacks. If he has one slice of cheese, he's ok...he doesn't immediately get an asthma attack...but if he eats cheese a couple of days in a row, he will start having allergies and in turn, he ends up with asthma. His stims and lack of eye contact, social skills, etc...greatly improved after removing ALL gluten for a couple of weeks...again, after about 4-6 days I start noticing a pattern/difference...but it takes about 2 weeks to see a considerable difference...
When he began on the diet, I also gave him probiotics...and vitamins...it seems that his reaction to both of these proteins is much milder now after being on probiotics for about 1 1/2 years...but too much of it, and all the same symptoms come back.
Sadly, it's hard to convince my family of the wonderful benefits...I just left him with my mom and came to find my son had gained quite alot of weight...he's not overweight, but I can see he gained some weight...grandma of course fed him as much gluten/cassein as anyone else if not more...between the sandwiches, pizza, candies, etc...well, you get the picture...
It's very expensive where I live to follow this diet, but hopefully in the next couple of months, I will begin the diet again once I move and even try it for myself...