I've been spending time on airplanes lately, so I'm slowly getting caught up on my weblog reading queue. I recently dequeued Paul Graham's note on hiring, and it reminds me of my advisor's metric -- whether a person has "bright eyes" (or not).
Assessing the brightness of someone's eyes has numerous advantages over degrees (which must be bought -- with tuition if nothing else -- and can be lied about), letters of recommendation (which are always guarded and almost always positive), references (which are selected to create a positive image), standardized test scores (which measure standardized capabilities), or other standard metrics; not the least of these is that it's an inclusive measurement as opposed to an exclusive measurement.
The downside of using ocular luminescence in hiring decisions is that it requires both talking and listening to candidates, so it's impossible to apply to a large applicant pool. It is a reasonable measure to apply to a small, pre-culled pool, but the probability is large that pre-processing already culled a number of bright-eyed candidates.
At least in my experience, bushy tails are irrelevant to hiring decisions...