It's not just skill/IQ, it's using the right tool for the job. Oh, and lag factors somewhat for those not in Europe/America >.>
Sorry to say but my main issue with SNAC aiming is sudden (increase in) lag when I get within 100m of the target. no only that but I also have trouble seeing where the shots are coming from (it looks like he's shooting sideways meanwhile he's actually shoot straight for me. This makes the cross hairs very unpredictable as well.