I found this Q/A portion very interesting

IDGNS: Some people criticize Google because its query-analysis technology is mostly based on keywords, as opposed to understanding natural language, like full sentences.

Mayer: Right now Google is really good with keywords and that's a limitation we think the search engine should be able to overcome with time. People should be able to ask questions and we should understand their meaning, or they should be able to talk about things at a conceptual level. We see a lot of concept-based questions -- not about what words will appear on the page but more like "what is this about?". A lot of people will turn to things like the semantic Web as a possible answer to that. But what we're seeing actually is that with a lot of data, you ultimately see things that seem intelligent even though they're done through brute force.

yep - i found that interesting too.
I believe the interviewer was referring to PowerSet and the like...