Although I know Dell has some pretty nice (and pricey) machines, I still perceive them to be (mainly) on the lower end of the consumer market. I could be entirely wrong ... but that's how I see Dell.
Will Google really get a reliable cross section of the world market from a tool bar on Dell machines? Or will they mainly get the lower end of the consumer market. In other words, are high ticket items likely to be sold to Dell computer owners?