I remember reading an article from a game developer who basically complained that porting to android simply added 10x more need to "tech support" for < 10% of the sales.
But .. you know.. freedom.
Well, freedom for the consumer, not the developer.
That said, developing for iOS does have one glaring issue that Android does not have... and that is Apple. Going through their approval process can be a bear. I've heard it's a bit better than the last time I worked for a company trying to get an app on their store, but... that was awful.