I wouldn't be particularly surprised if they outsource the non-iOS development. Many multi-platform shops I know build only one flavor and then to save on full-time developer costs send out the work on other platforms elsewhere. I know of a few startups doing mobile apps who are now hiring Android devs, but did those apps as a purely out-of-house thing when they were small.

And it wouldn't be new for the industry. I had a buddy at Midway Chicago for many years, where they used to do many of their sports games on XBox and outsource the PS3/Wii ports.