A common refrain heard from Apple critics is that Apple's success has everything to do with marketing and not much at all to do with innovative products. In years past, for instance, they often liked to say that the iPod was just a ho-hum MP3 player that was able to own the market thanks to an assortment of dancing silhouette ads.
In truth, advertising will only take you so far. In the short term, it's a great way to introduce the public to your product, but in the long run, a cash infused marketing campaign touting less than stellar products that consumers don't want is destined to fail.
That being the case, Horace Dediu of Asymco last week posted a chart which really puts Apple's advertising efforts into perspective.