Generally, I do like skill charts that look like RPG character sheets (so much so, I've been using this paradigm for my own skill profile http://udos.name), however as you said this particular one seems indeed a bit devoid of actual information. Even if the categories were meaningful, what's the point in having a scale of 1 to 7 when the lowest outlier rating you give yourself is 4?
Character sheet is pure awesomeness. I realized how subjective the interview process when my last interview --- yesturday --- was entirely composed of: "From 1-10, 10 being the creator of the language, how are you with X? How about y? And Z?"
This kind of online resume gets past all that kind of stuff. I see real value in being able to cleanly present this kind of high-level skillset info to employers PRE-interview.
True. Of course even if you could trust it, it's a gross simplification. In reality, those dots mean different things in different contexts. But I still liked the idea of conveying some measure of experience related to a given subject instead of just listing buzzwords indiscriminately.