Threadwatch links to a blog post named Google SERPs Platform Dependant? that shows how a search for a query on Google, on the same network but on two computer operating systems, can product a different result set. The screen captures documented show the differences between a Mac and a PC.
I personally ran the test and I found slightly different results for the keyword phrase "sports" on a Windows PC versus a Mac. Is this out of the ordinary, I do not think so. I have found that Google changes the results sets based on the following criteria;
(1) Geographic location
(2) Personalization preferences
(3) Data center accessing
(5) Operating System
(6) and some other methods.
Meet Your Favorite Search Engine Watch Contributors
Many of SEW's leading expert contributors will be at ClickZ Live, the new online and digital marketing event kicking off in New York (March 31-April 3). Hear from the likes of: Thom Craver, Josh Braaten, Lisa Barone, Simon Heseltine, Josh McCoy, Lisa Raehsler, Greg Jarboe, Dan Cristo, Joseph Kerschbaum, John Gagnon, Eric Enge and more!