One of the oft-cited shortcomings of Apple's OS update distribution scheme for the iPhone and iPad is that it can't be done over the air. Instead, the device must be tethered to a computer, with updates downloaded and installed via iTunes. Note that Research in Motion uses a similar client application for updating firmware in BlackBerrys.
In contrast, Android phones are updated wirelessly over a 3G or Wi-Fi connection. Yet what Android gives in convenience it takes away in control, since users are at the mercy of their carriers for providing an over-the-air update (the only user-initiated approach requires jailbreaking the phone, downloading a compatible Android binary of questionable authenticity and security, and following a detailed installation process that usually involves booting the phone into recovery mode). The problem is that carriers' cavalier attitudes toward their customers means OS upgrades are few and far between.
The tracking imbroglio provides a case in point on the security ramifications of the two approaches. Kvetching about Apple's weeklong delay in responding to the initial report documenting the unsecured iPhone location cache aside, it clearly has been more responsive in documenting and fixing the problem than Google. Apple released a detailed statement about a week after initial media reports of the problem (Google waited until last week's hearing before providing similar detail) and released an OS patch fixing the problem a week after that (and a full week before the hearing). While Google says location tracking can be turned off by application, it admits that storing and securing location data is the responsibility of individual apps and isn't something users or Google can control other than to disable what is often a critical piece of the application software.
What this incident highlights, however, is a user's helplessness in the face of a potentially more serious OS flaw. While we expect our PC operating systems to be regularly, and in many cases, automatically, patched to counter the latest security hole, we don't have that same assurance with our phones and tablets.
Apple has been quite vigorous in patching iOS, with three updates since the latest major version rolled out with the iPad 2 in March, and leaves control over downloading and installation with the user. Google, on the other hand, keeps the ball in the carriers' court, and let's just say, I'm still waiting for Android 2.3 (Gingerbread) to hit my Droid X more than five months after its release. This leaves me with the sinking feeling that I may have to live with a gaping security hole for a long time should a major Android threat hit the wild.
So, before updating your smartphone or getting that new tablet, think about how you'll keep it patched and secure, since your interests and the vendors' aren't necessarily aligned.