Interesting observations.

I have a new Mini that shoots about as well as their test sample's did. I have an old Mini that shoots about that well too but I poured money on it to get it there. They both suffer from groups widening when they heat up.

I do like using them to hunt with better than an AR. They also seem more reliable. They are a whole lot harder to modify into a target gun than an AR. I am not sure that the cost to do so is that much different.

The Mini-30 results are so different from my experiences that I almost want to try a new on but I swore off.

My own AR seems to do better than their test examples with iron sights or with a scope. The one my youngest son built last winter shoots about like their test rifles.

I have a friend who has several AR's. He has at least one, a CAR that
exhibits terrible accuracy. About like an early Mini-30 [4-12" groups, worse when hot].