Quote: "Well thats a completely false statement, in Project Blue you can have as many as you want and the best part is you can use your own custom ones."
Actually, this is a false statement. efxMod allows usage of custom fs shaders, though they should be written in flex-style for full compatibility. Most of the efxMod features are undocumented, for example the flex script commands.
Every FS shader you see in efxMod (e.g. flexBloom, Motion Blur, Sharpening, HSL, etc.) are custom shaders, though they're implemented directly into the exe to provide a basic shader "equipment" without having to download or write new shaders.
Quote: "Don't you know some people can't run efxMod? That's the only problem with it. It's like Crysis..."
If you really tried efxMod, you'd know the performance is much better than Corvus or Corvus-based mods and it should overtake every other graphical-enhancement-mod with similar effects.
There should be a detailed comparison (including technical details, image quality/graphic bugs for fairness), imho.

Intel Xeon 3350 Quad@2,67GHz, Asus Commando, 2GB RAM, Thermaltake Shark, Sapphire Radeon HD2900XT, Samsung Syncmaster 245B 24"