In case you didn't realize Crossfit games 2014 are going on right now. I was pretty impressed last night with the speed clean ladder. There were a couple guys that did 365lb without blinking. Very impressive. Especially when you take into account that they were doing several other sets previous to that attempt. I believe it was 4-5 reps in like under 30 seconds.
A patient of mine won the overall Masters division this year. Outstanding individual. High quality person. He is in crazy shape. He has been doing Crossfit for awhile.
If you have great technique you can do awesome things. Volume will build or break you. If you cheat the body and add volume eventually it will break you. If you keep movement great and technique solid, volume will build you.