I'm a Microsoft Training Consultant and work from home developing training courses etc for MS.
I have a Windows 7 Laptop (although this never gets used). All of my work is done either on my iMac or my MBP. Everytime I give a presentation it is done using Keynote, as I prefer it to PowerPoint.
As far as I am concerned, Apple just make better systems! (Although that is not my professional opinion of course!
Not really a big deal to see a Mac at a Microsoft event since Microsoft doesn't make PCs and you can run Windows on a Mac, but the spelling error is funny!
(Albeit the "Business Leadership..." bit is PS'ed in.)
you slag them off but correct me if I am wrong but I think I remember reading somewhere that Apple stores uses Windows for the cash register systems? :S