Perhaps. But Google putting a huge banner on Google.com saying, "Hey, use GoogleGPT!" would result in a high percentage of the billion+ Google searchers using i

Perhaps. But Google putting a huge banner on Google.com saying, "Hey, use GoogleGPT!" would result in a high percentage of the billion+ Google searchers using it. It's not really the same scenario. For what it's worth, I do think Microsoft or Yahoo could have properly countered Google if they executed more effectively sooner.