Regarding a colonoscopy, i understand there is a ranking # that is used to track dr's. procedure outcome on finding polyps?

Adenoma detection: Adenoma detection rate is the standard you are thinking of (different from polyp detection rate as not all polyps are adenomatous, or precancerous). The minimum standard is around 25 percent for average risk screening colonoscopies, though many groups, like ours, achieve rates closer to 40%. These rates are usually self reported and take a bit of work to compile, so not everyone reports them.