Android is awesome and has been the best mobile OS since cupcake in 2008. It's quite amazing to consider that Android runs smoothly on 1000 different hardware designs, with different processors, different screens, different memory at all kinds of different prices. Basically Android is the fastest that mobile OS can be on any hardware that runs it. Put Android on the iPhone 4S hardware and it'll run much faster and better than iOS.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?