Yes. They also have a reputation for preferring quantity over quality (half-assed pullups) and a generally sloppy approach to safety (yeah sure do squats while balancing on an exercise ball). Check out the deadlift form in the "crossfit games": https://youtu.be/0lr1p7f2P4Y?t=50s

Or how they do "pullups": https://youtu.be/XQvSmqChm6M?t=1m40s