There was a relatively muted response to the arrival of the new iPad Mini on Friday (November 2), with fewer customers queuing up to get the 7.9-inch screen WiFi tablet compared with other Apple product debuts.
Also on Friday, Apple started selling the WiFi-only iPad 4, offering a slight refresh on the model that was only introduced in March this year.
Apple says that it shifted 3m iPad models over the weekend, which was "double the previous first weekend milestone of 1.5 million WiFi-only models sold for the third generation iPad in March".
However, Apple has not given an exact breakdown of sales for the new iPad and the iPad Mini, which would have given a clearer indication of demand, particularly for the new product.
In a statement, Apple's chief executive Tim Cook just said that the firm had "practically sold out of iPad Minis".
"Customers around the world love the new iPad Mini and fourth generation iPad," said Cook.
"We set a new launch weekend record and practically sold out of iPad minis. We're working hard to build more quickly to meet the incredible demand."
Apple added that demand for iPad Mini "exceeded the initial supply", and so whilst most pre-orders have now been shipped, some will slip to later in the month.
Both the WiFi-only iPad Mini and fourth-gen iPad are available now in 34 countries including the US, Australia, Canada, France, Germany, Hong Kong, Japan, South Korea and the UK. This will expand to many more countries later this year, including mainland China.
The new iPad Mini features a 7.9-inch Multi-Touch display, FaceTime HD and iSight cameras, ultrafast wireless performance and around 10 hours of battery life.
The fourth generation iPad features a 9.7-inch Retina display, Apple's new A6X chip, FaceTime HD camera and 4G connectivity in more markets, including the UK on EE.
Apple said that the 3G/4G versions of both the iPad Mini and fourth generation iPad will ship "in a few weeks" in the US, and in more countries later this year.
The company did not give an exact date for the UK release, but it is expected the products will arrive at some point in November.