I found one article about the sales of the S2 from an "android news" site, that indicated it was selling 2-3 million a month. I'm sure it is the best selling android phone, and I say anything that sells more than a million units in a year is a "hit", but that's not a lot of sales compared to the iPhone. It certainly hasn't broken out into the mainstream like the iPhone has.
Look at the comment I was responding to, that people must not be loving the Galaxy S2 because "there would be a hell of a lot more sales of it than there are..."
