First of all, what you said... although I mostly agree with the blog post, he certainly did not need to use the raw language to get his point across.
However, Tom Morris is right as far as the graphic goes. Although there is nothing wrong with using charts and graphs to draw reader attention, whoever ran that could have separated the text from the graphic elements to make it more accessible for all. Then, they should have used some alt-text on the elements that remained to explain their significance to the visitor.
I actually think part of the problem comes from the words we make up to describe new technologies. Info-graphics is one of them. It is a graphic and if it does not share information with everyone, it certainly is not an "info" anything. Good marketers know that in order to sell anything, you break it down to simple enough for all to understand it.
What is really disquieting is that the graphic gives the impression that Apple either knows little or cares little about accessibility. Pretty shabby for a company that makes its revenue from Internet technology.
All in all, that graphic sure lacks the juice.