What reason would the search engine have for 'funneling and manipulating search results'?
Well, I for one will.
Unfortunately you might be mixing the crux of what Tedster is revealing here - which is the theoretical analysis of user intention and ways in which search engines might group data, and select pages based on how these pages might score within sub clusters.
My sense is that Bing jumped on this quite quickly from what I see. This is pretty evident in the Bing travel section, with the difference in that Google is blending the clustered data in better with the actual result set, while Bing is providing those related links in other ways.
Nonetheless, in the coming days it will be interesting to see how this evolves (and it will)