Getting very nostalgic watching this show match 8-)
Counter-Strike 1.6 and below was (is) such a great game, simply because the engine worked perfectly for FPS, spot on shots, great recoil and weapons handling. Just perfect. I'd rather play 1.6 than any other FPS if we're talking team vs team, (Quake for 1v1).
The reason CS after 1.6 never had the same success is due to the Source engine simply being the mush rubbish engine for any semi-serious FPS, and obviously also the lack of any graphical and technological updates to the game. Source engine works great for the more lighthearted fun and comical games such as Team Fortress 2, but definitely not for CS:S or CS:GO, albeit CS:GO is a decent game weapons handling-wise on a 128 tick server.
Full match vids (2 hours):