I have no data, and I personally use Linux and track point equipped machines, but my observation is Mac fans paying for their computers with their own money are not buying the new macs. I suspect that the sales number are reflecting corporate sales. I think Apple should remember that it is people from the former group who have managed to arm-twist corporations to look at non-Windows machines, that and the slow rise of Linux acceptance in more and more companies should make them listen to people who don't want Windows want.