As in Marcia, Marcia, Marcia! Here's an idea, though not an easy one. The USTA (or someone) ought to start collecting video footage of players at various levels and indicate why they are at that level. For example, you might see someone and say "their strokes are awful, how can they possibly be x.x?" or "their strokes look great, how can they possible be x.x?". Sometimes you can tell a lot by the way a person hits mechanically. With MattyG, it would help to see how often he hits the net. The strokes look like 4.0, but if he misses every third shot or can't cover wide shots, then that would lower his rating. On the other hand, if he serves and returns well, maybe that bumps it up. Many things can factor in. Assessing people's levels through videos is useful, even if not wholly accurate. Without such videos, people might otherwise classify themselves as 5.0 (I can hit a lob, I can hit several shots in a row and place it). The NTRP system fails to mention pace of shot as a criteria or how consistent a player should be, or how often they should hit a bad looking shot which might let people more accurately assess themselves. Point is, if there were videos and commentaries, you could refer someone to them and they could get some sense of their rating.