Obviously being good or not depends on your definition of "good." I consider being a winning player (which is better than most players) to be good. I think anybody can be "good" if they put a little time and effort into it. IE, they put in a good amount of off-the-table learning time.
Now, of the 15% (or whatever the real number is... I'm just guessing at 15%) of players who are profitable, there varying degrees of "good." Personally, I'm at the not-so-good end of the spectrum.
How are you getting these stats? I assume you're using PokerTracker?
If you break even or make a profit at the ring games, you are better than average in ring games.
As far as seeing how you're doing at tournaments, plug your online ID into Officialpokerrankings
and see what rating they give you. I think anything above 50% is better than average, but I'm not sure.
You can also try look at SharkScope (http://sharkscope.com). (Neither of these sites aren't 100% accurate, but they'll get you in the ballpark.)