[pkinsky]

That's absolutely right. I suggest a simple experiment here: https://news.ycombinator.com/item?id=12420407

It should be possible to come up with ~10 'clone' games (slap trump/hillary with a fish, hit trump/hillary in the face with a pie, etc) by swapping a few assets. Phonegap could be used to deploy the same simple javascript/html5 app on android and iOS. Submit each app to Google/Apple and see what the acceptance rates look like. I would think that would be enough to confirm or disprove the existence of any bias.