Crossfit is all about conditioning. Period. That's how you win at crossfit. Just don't ever get tired and you stand a pretty good chance.. But check this out:
Do you think a sturdy strength foundation helps these numbers and drives a higher level of conditioning? Do you think a cleaning over 300 lbs is even romotely possible without a front squat that is far advanced of that? How about a 250 lbs snatch? Is it possible without a much stronger OH Squat?
Don't forget, Crossfit is conditioning.. Not a strength training program. Is strength a factor?
Don't forget about this either: These rules are NOT optional. Ever.