As InBetween said, CO's are pretty much mid-level managers. And every employee in the world tries his/her best when being directly observed by a supervisor. It's human. Nothing wrong with that.
And, yes there are true honest to god elders (as RayPublisher) trying their best, honestly. I don't think "white-washing' is a fair term for those cases. You just clean your house better when you have important visitors.
But there are way too many elders that will flat cross the fine line into being deceptive, tweaking the facts, and then flat out lying.
Too many times when visiting congregations I easily picked the mismatch between hard facts and what elders were telling me. I once found a sister reporting One hour, consitently every month for over a year. Long story short: she had died 6 months before at a nursing home. Boy did I let that Secretary have it!
And anyone can tell when they lie about shepherding.