Fast though. At least they understand that much about why Google won.
It's funny to think that after all the engineering expertise that must have gone into this, they're going to lose because of UI design.
I've thought on more than one occasion while burrowing down with repeated queries that search should involve more of the machine prompting me and less of me guessing at the right keywords. Bing's UI promotes that behavior, whereas my eyes just skip over the recommended queries at the bottom of Google.
Combined with the impressive speed, I think it stands a chance.
Google gives you the advanced search options pane, and then shows you how to format your search query so you can create the advanced search on-the-fly next time (such as by adding -, +, quotes and the like), as they see the command-line interface to their search as superior.
Heh, I love how Microsoft is running a Google ad on "search options" that points to Bing.
MS is using Akamai as the CDN to deliver search results, hence it is fast.