Hehe, thanks!
You'll probably get there yourself eventually, angry birds is mostly a matter of time and luck.

About the leaderboard scores, I believe totals around 17,5M. I'm not sure about higher ones at the moment. I'd say 17,75 is still realistic, but I don't think a lot of people have a legit total this high at the moment... The last themes haven't been around for long enough yet ^^

I started working a bit on episode 4 even though I still have levels to re-do in episode 3. I figured I needed a change of scenery. Plus, I've been getting improvements (though not always big) very quickly so far, which is very satisfying.