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> We then could inspect the query stream to estimate how many queries might be well served by HTML tables.

Hmm.. humans are inspecting the query stream?

There's lots more data over here: http://www.google.com/trends

(I don't believe the author was referring to this, I think he meant something far less interesting.)

Obviously not, except for debugging. Scoring logic is most likely where the "secret sauce" of the thing they did is hidden.