Since this has moved to "chit-chat" I don't think it's too off topic. There are 2 current study's of Mac market share, and even my 3% guess was generous. Both studies have slightly conflicting numbers but I'll post them both for you
U.S. Mac Market Share
1Q 2005: 3.8%
4Q 2005 (AI): 3.5%
1Q 2006 (ZDNet): 3.5%
1Q 2006 (AI): 3.6%
Worldwide Mac Market Share
1Q 2005: 2.2%
1Q 2006 (ZDNet): 2.3%
1Q 2006 (AI): 2.0%
So at the best, worldwide Mac only get's 2.3% of market share and possibly even less. It's definitly less than you 6%, and even less than my 3%. I was going for total worldwide computer in my figures, but if you had asumed I was going US then I was slightly low, but not by much.