"To have this many options and discrepancies over something as simple as copy and paste should be embarrassing to Google. What it mostly is, however, is a pain to the end user.
And that's kind of the crux of our problem with Android in its current state. We don't question the power of the OS, but the fit, finish, and ease of use simply is still not there."
I think Joshua Topolsky nailed it right at the heart of the problem for Android, at least from a typical smartphone user's point of view.