I think the MSN search is factoring in different thing for their search. To be very honest I am becoming less happy with Google as the years go on. As with most companies they started off doing one thing and did it really well. Now they are trying to do 20 things and doing them so-so.
Take our PR value (page rank). For years we were a 5 out of 10 and then for what seemed like no reason we dropped to a 4 of 10. This was pretty sad for me as I was really hoping we would be a 6 of 10 or higher on that ranking by now.

Jim