An article in Slate makes the case, a bit excitedly, that popular college/University ranking entities should present the ratio of permanent to temporary faculty more prominently. I agree wholeheartedly that this is information the consumer needs to know. The relative adjunctification is highly pertinent to the quality of education on offer.
The simple ratio of teaching bodies is not enough, though it is probably the only thing Deans and Presidents are willing to report.
Ideally the percentage of student contact hours, including labs and sections, would be reported by tenure track status of the instructor.