Look at the code, it blatantly says "e3". When you take a close look at all the little details from the e3 reveal and then their screens once they started reenabling things you can definitely tell that Ubisoft purposely botched the PC release. It was found that textures were double rendered to decrease performance. That being said once reversed even bringing the extra enhancements that were already there most people are noticing FPS smoothing and an increase in FPS due to the game not eating a ridiculous amount of VRAM anymore. The guy who made the Crysis 3 helping mods is also in on this and has pretty much fixed the stutter issues too.
The only thing that I don't approve that the guy has been doing is dicking around with DoF and Bloom. His excuse is "you have these in RL". Yea, in RL I can see further than 10ft too.