I guess that's better than about 80% of people with adsense. Those earning more tend to keep pretty quiet about their niche! Now just try and increase the traffic and avoid smartpricing - I used to get more than that average per click but I don't anymore...
I'd say that's very good. Your average earnings per click are probably in the top 90% for those with more than 100 clicks per day. I would guess the average earnings per click is little more than half of what you're getting. Whatever niche you're targeting, I'd stick with it.