No, this was not a study in the most recent issue of the scholarly journal Duh. It's a set of data culled from some 388,000 people on the question site Hunch. That data was then cross referenced with other data to form a bunch of conclusions that will make you angry if you're a PC user. The headline getting all the attention is that Mac users tend to be a lot better educated than PC users. Not all that shocking considering Macs cost more and people with more education tend to get paid more.
Also, Mac users are more likely to throw parties and prefer Jon Stewart over Jay Leno. PC users prefer McDonald's French fries, Mac users like bistro style French fries.
NOW YOU KNOW.