One of the most frustrating parts of the Android ecosystem is the often long delay between the time that Google releases and updated version of Android and the time it's delivered to ernd-users' phones and tablets. Motorola has been no stranger to these delays, often waiting months before sending out major revisions to Android. Christy Wyatt, Senior Vice President of Motorola's Enterprise Business unit, offered and explanation to PC World: it's the myriad of hardware differences between phone models that makes upgrades take so long.