Does MSN Search Favor IIS-Hosted Sites?

Does Microsoft consider the server environment a site is hosted on when applying relevancy rankings for their search results? If this were indeed true, wouldn't manipulation of this sort render their SERPs as biased and non-relevant?

Top Brands On The Net

BBC News: "eBay is the top brand name on the net, according to calculations by net monitoring company Envisional.

But Is It Search?

Yahoo, unsurprisingly, is taking steps towards being a banner ad-serving company via its network of content publisher partners. Google recently announced their own progress in this area, which included allowing animated banners, and a new CPM-based pricing system.