Apple has always seen good adoption of its latest operating system, and iOS 6 is doesn't break away from this norm. Undoubtedly, the over-the-air nature of this latest update improved adoption rates and shortened the time it took for the adoption rate to hit 50 percent and other benchmark numbers.
iPhone users were most likely to upgrade to the latest operating system, with roughly 60 percent of owners having upgraded to the latest and greatest operating system as of Sunday. iPad users are also upgrade happy, though not quite as much as their iPhone-owning counterparts as only 45 percent had upgraded as of Sunday.
iPod touch users seem a bit more disinterested in upgrading, and this could be due, in part, to them having to be connected to Wi-Fi. It limits the locations that upgrades can take place, and I would venture to guess hampered upgrades. They reached 40 percent as of last Sunday, which still blows away Android's adoption rate.