It has been my observation that the statement above can be true with AR's. You here a lot of complaints about spinners and runners with the 223 and it isn't all about poor bullet selection. Most of the complaints come from AR shooters while bolt action shooters a killing them dead with 22 Hornets, 17 Rem, 221 Fireballs and 222 Rem. I think that a lot of AR shooters tend to think more about having shots 2-20 than putting the first one where it counts.
Most of the predator hunters that visit this sight are experienced shooters and can get the benefits of the AR.