its alot of demo thats for sure, i conclude... yes!

he dosnt "follow" threw the walls what i noticed is that he would put his cursor on the enemy threw the wall then look a bit away and strafe into him for the head shot.

this happened alot.

i also saw a few times when he would shot at an enemy he couldnt even possibly of seen with out wall hacks on. ie he shots a train in the beginning of the demo.