I have noticed this trend myself. I work in IT and every job I've recently applied for wants Mac experience.
Two jobs didn't even mention Windows o_0.
Don't get me wrong, I love my Macs but I make a living fixing Windows desktops and servers and when Macs come in to the picture, work requests plummet and thats not really a good thing :/ I know from first hand experience, the department I used to support and have several tickets for daily hasn't had a single ticket in 6 months after switching from Windows to Mac
That being said it also depends what kind of jobs you target. There is still a lot larger Windows presence in the IT world but companies are getting sick of the "every other release is good" schedule from Microsoft.
Oh, and Windows 8 is really helping people push to Mac :/