Seems to be using some combination of wallhack and humanised bot. In other games, his rails always hit the legs (as if his bot is configured to shoot at cg_enemylowercolor).
He has changed his name to "5kull_" since this demo was recorded (obviously to avoid the cheating accusations I had already levelled on him)
I think it's pretty obvious from this video, let me know what you think.
Please note that this isn't about having perfect aim - it's a humanised bot. His aim seems to consist of 5-6 'micro' movements in the last quarter of a second of 8:44, and again towards the end of 8:46
Edit: Also please watch this demo before you comment, follow his POV. http://www.esreality.com/download.php?file_id=85705 - or watch on youtube http://youtu.be/w3b9L0Z7JrM
Short clip showing targeting through walls/floor http://youtu.be/dTgBCWzFvPE
Edited by diabz at 19:02 CST, 11 February 2012 - 9591 Hits