Steve Jobs speaking with analysts during Monday’s conference call:
Twitter client [TweetDeck] recently launched their app for Android. They reported that they had to contend with more than a hundred different versions of Android software on 244 different handsets. The multiple hardware and software iterations present developers with a daunting challenge. Many Android apps work only on selected Android handsets, running selected Android versions. And this is for handsets that have been shipped less than 12 months ago! Compare this with iPhone, where there are two versions of the software, the current and the most recent predecessor, to test against.
Transcript published by Macworld.