I do have a few colleagues at work that don't like Apples (heck, my boss put my brand new Powerbook in a metal bin once). But it's mostly because they don't understand them very much, and they're also gamers - and we know that Apples don't fare too well in that arena (no pun intended).
Yeah I think you got the ratio right. I'd like to see the ratio that is specific to home users (as most businesses use PCs). And then a separate statistic divided up by countries. Apples are designed by Americans, for Americans. So it's likely that the ratio would be higher in the USA than in other countries.