Okay I finally was able to join a CSS server and I've figured out why performance is so much better than Doom 3: it doesn't look nearly as good. While there are some cool particle and shader effects for the most part this could just as easily be a Quake III engine game. That's not to say it looks bad, just that the graphics in CSS arn't a huge leap past the graphics in CSCZ. For the most part CSS is just a slight improvement in graphics coupled with a floatier feel than the original CS.Have you been looking at the same game as the rest of us ??? Slight improvement in graphics ??? its got about the best graphics engine there is... it beats Doom 3 on lighting for god sake its supposidly strong point, and has particle effects that are astounding real. Texture quality is good but not great looks close to real but just not there which when you take the rest of the engine in comparison is a let down
All in all the Source engine is a great engine, which if its as scalable as Valve say could easily become the standard graphics engine.