Gameloft (one of the top developers of games for both iOS and Android) has tweeted that going forward they intend to release their games for both platforms at the same time.
In the past it has been common practice to release the iOS version first, followed by the Android version a month or two later. Supporting the Android platform is more of a challenge due to the variety of devices available, and in the past Gameloft have released titles for just a limited number of devices. However this has changed recently and recent titles support almost all devices.
This all goes to show that Android is no longer playing second fiddle to iOS, and even though it is a greater challenge to support the wide range of Android devices, top developers are now willing to make that extra effort.