The self-deprecating jokes are certainly uncharacteristic, but I felt like they were apt given the current situation Apple finds itself in. By addressing the ‘Forstall era’ directly, they effectively distanced themselves from it. It was a separating point, and implied this was in the past. Portraying awareness of their missteps was important, as it (subtly) showed that Apple knew what needed changing and where it needed to go next to maintain its position as market leader. It’s almost as if the new Mac Pro was revealed as proof that this hypothesis is valid.