Macs comprise 66% of Q1 '08 retail sales of "premium" PCs.
Apple laptops have had 50-60% growth.
If you consider that people who buy above $1000 PCs retail are free to choose whatever computer they want, then most people are choosing Macs these days.
Most People Who Buy Their Own Premium Computer Buy a MacCategories: News & Commentary
So what does this tell me? It tells me that when someone is buying a computer for themselves or their family, and they are willing to spend over $1000, buyers are overwhelmingly choosing Macs. And not just by a little: the number is two-thirds.
These are consumers voting with their own hard earned dollars. I think that is a more significant data point than the markets where the IT department decides for you what will be on your desk or what you buy when you've only got $500 to spend. These people aren't the bargain hunters. Ask Dell how serving that market is going. These are people with a more significant investment choosing what will be the computer they want to use.
I like the way this trend is pointing: most people who have the freedom to choose are choosing Macs.