Actually, he did. Confirmation bias: you only remember what supports your arguments.
Check this article, just one of many. Steve Jobs told many lies, exaggerations, and half-truths, just as any other CEO does.
Steve Jobs' reality distortion takes its toll on truth
Yeah. There were several. Although at least some of them may have been innocent in respect that they may have changed their mind. The Mac Mini was a notable one. However, Apple's statements have always been about products. They have never lied about the performance of their products. This article you mention has many lies and half truths in it though. For example the antenna issue was blown out of proportion by the media. Apple does not measure sales by products sold in to the channel. They measure actual sales. Activation numbers didn't add up with checks in the channel according to Steve Jobs. Try to prove him wrong. He assumed they were counting upgrades, but that doesn't mean something else didn't throw their numbers off. Google hasn't released actual data to back up their claim that he is wrong. Google says their data is right, but they may be counting peak activations in a day or averaging over 5 days or something like that.