User blog comment:DirgeOfCerberus111/Adeptus Custodes Vs. Grey Knights/@comment-64.187.66.176-20140214022155

I think we are all forgetting that the Custodes don't leave the Emperor's side. The Grey Knights are out fighting all of the time. The average Grey Knight has had more combat experience than a Custodes of the modern Imperium. No amount of genetic superiority or engineering can help you if you don't practice with it.