Don't think so, can't remember ever seeing a marketing campaign for any particular flavour of linux distro, hence the "just out of interest".

On the other hand, is marketing really the issue? Is steve jobs simply the best salesman on the planet? Probably not. Sure Apple plays up their devices, they hype them to a huge extent, but we are just entering the 4th age of the iphone, there has to be something behind all the marketing. It's not like Jobs is selling us all the emperor's new clothes. if that were the case it would have been seen through by now.

There are many factors in Apple's success story other than Marketing.