Wikipedia: "A pie chart is a circular chart divided into sectors, illustrating relative magnitudes or frequencies or percents. In a pie chart, the arc length of each sector (and consequently its central angle and area), is proportional to the quantity it represents. Together, the sectors create a full disk. It is named for its resemblance to a pie which has been sliced."
Steve isn't using a pie chart there - he's just using a pretty picture that looks like one. The amount of effort put into exagerating Steve's manhood here is impressive - Goebbels would doubtless have loved it. As I'm anal about the abuse of statistics, I thought I'd list the key ways that this slide sets out to manipulate the viewer:
- It isn't a pie chart -if it was, the centre point would lie directly in line with the widest point of the ellipse (even with the 3D tilting). It doesn't, it's way above - destroying any proportionality between the sections and therefore any value in the chart as a genuine representation of the numbers displayed on it. Instead, it's a lie - socks stuffed down Steve's trousers.
- The circle looks slightly tilted in 3D, with the bottom of Apple's section most visible - making their section look slightly bigger. If it were a real pie chart, that wouldn't evoke comment, but as it's a fake this has clearly been factored in as well.
- Apple's section of the fake pie is in green. The eye has higher sensitivity to green because it has more green detectors than red or blue, so this gives a small visual boost to Apple's section. There's nothing wrong with that, but it shows the level of viewer manipulation that the designers were considering.
It's a lovely product, and it is selling well. Mr Jobs, making yourself look like a confidence trickster does no-one any favours.