Apple today announced it has sold three million of its incredible new iPad, since its launch on Friday, March 16.
That's a big number. Apple didn't announce sales of the iPad 2, which was heavily constrained for months after the release. By most accounts, new iPads were available for those who really wanted one at launch, whether via pre-sale or in-store somewhere. It was also available in a number of countries, so it stands to reason it would sell big, but this number is probably bigger than most would guess.
By contrast, the iPhone 4S shipped four million units in its first blockbuster weekend. The iPhone is well established, sold in more countries, and had a backlog of people waiting for a new phone since the summer before. Plus, lower out of pocket expense.