"I'm worried about you getting this done by the deadline because you are such a perfectionist."
"I'm not a perfectionist. People only think I'm a perfectionist because they think I'm hard-working and yet unproductive. This always causes people to leap to the conclusion of perfectionism. Why is it not that I'm just ridiculously unfocused? Or that I'm an incorrigible screw-up? Or that I'm not really very smart? Or that I'm not really very hard-working? All these seem as plausible to me as the perfectionist theory."