A couple weeks ago, Google updated their Android version install-base breakdown and revealed that Ice Cream Sandwich had finally (after nearly a full year) reached 20% of Android phones in use today.

To fully understand the significance of this, Apple’s iOS 6 reached 15% of eligible devices in 24 hours.

An important distinction, however, is that most Android devices without ICS are ineligible to receive it as the manufacturers never made it available for certain devices. Still, that doesn’t mean those devices are incapable of running it, as many custom ROMs out there are capable of bringing ICS to devices that won’t get an official release.

This is probably the most significant indicator that Apple’s integrated model as both the hardware and software designer is a huge benefit to customers.