Now, this by itself isn't necessarily a shock either. Bigger ticket products like the iPad are things that people tend to hold onto for longer, and we've only just seen a new batch of iPads (well, one new iPad and one very mildly tweaked one) make their debut. Stalwarts will say just give it some time, the iPad'll pick up steam again, and it very well may do so -- there's an iPad at nearly every notable price point now. With the launch of a device like the iPhone 6 Plus, though, a device that for many people will ably straddle the line between the iPhone and the iPad Mini, it'll be interesting to see if the iPad manages to regain it's former sales glory. The fact that the iPad Mini wasn't barely touched this year won't help matters -- it got all of what, five sentences dedicated to it during the iPad Air 2's grand unveiling? Sure, part of that is almost certainly due to the cost and complexity of shrinking components and refining design, but the continued (some would say overwhelming) demand for Apple's bigger iPhones may wind up eating away at the iPad's relevance in some very curious ways.
(Brief parting aside: If you want some really interesting numbers, next quarter will factor in the new iPhones' momentum in China, and the one after that will chronicle Apple's typical holiday explosion. We're expecting a doozy.)
Update: Apple's talking iPad on its earnings call right now -- it says this quarter's sales were consistent with its expectations, and apparently did really well in Japan. The iPad also remains the United States' education tablet of choice. Later, during the Q&A session, Tim Cook said Apple looks at this iPad dip as a "speedbump and not a huge thing" and went on to note that he personally sees a "great future" for the company's tablets.