http://www.winehq.org/webalizer/usage_200507.html#TOPAGENTS
It seems to be around 50 - 50. Webalizer does some strange things but you can get the gist of it from that page.
On Thu, 2005-07-07 at 00:00 +0200, Felix Nawothnig wrote:
Sijmen Mulder wrote:
He's got a point there. The target audience is mostly the Linux user - which won't be using Internet Explorer anyways!
I'd think that a large percentage of the people visiting WineHQ are using MSIE - even on Slashdot the vast majority of the viewers use it, although every second article bashes Microsoft, tells about another MSIE exploit or praises another FireFox extension.
Felix