The company brings up research that says 25% of people that drink A1 milk feel discomfort, yet they don't have a number for their own a2 milk, just anecdotes. An experiment comparing the discomfort of a1 vs. A2 milk would be very cheap to run and potentially very valuable to the company. So I'd assume they've done that test and the fact they're not reporting positive results means the experiments don't show any benefit to A2 milk.
