Seriously though, I don't think "the street" really understands Google's business. In terms of minutes for the search business, the less time a user is on the site the more effective the product. You can't compare these two companies this way and have it mean anything. Personally I would value Google higher than Yahoo. Google seems to be building a business, while Yahoo is after a quick buck. That being said, most people on "the street" only are after a quick buck.
I heard yesterday on CNBC "the search market is shrinking anyway...just ask AskJeeves." That's like saying there is no market for cars in the US, just ask Alfa Romero, Renault, or Yugo.
Google says they are in this for the long term, quick buck be damned. It will be interesting to read through this thread in a few years, after seeing how things shake out.