Google may not control Android
through the OHA but it unquestionably controls the platform through other means. If you want early access to new versions of Android, or you want to market your devices as Android compatible, or you want to include Google applications on the device, you are required to agree with Google's terms and license.
Hell, it was reported that Acer abruptly canceled the release of a device last month because Google threatened to cancel their Android license. Assuming the reports are true, that sure meets my definition of control.
http://www.pcworld.com/article/2622..._as_acer_cancels_china_smartphone_launch.html