With Googles stock price at $412 US you would expect that the most if not all of their product releases are No.1 World Wide. I found an interesting piece of research specific to Google product rankings:

*Google Talk – The ten-month-old instant-messaging system ranks No.10 in the world, with just two percent as many users as market leader MSN.

*Google Maps – Although it ranks No.2 worldwide, viewership is 20% less than market leader MapQuest.

*Blog Search This nine-month old web log service was expected to bury market-leading Technorati. It gets less than one-fifth as many users.

*Google Finance Three-months after its launch, the site ranks No.40 in the U.S.—despite strong initial buzz. Yahoo! Finance remains number one.

*Orkut The social-networking site gets less than one percent as many U.S. visitors as MySpace.com. [Source: BusinessWeek, July 10, 2006, “So Much Fanfare, So Few Hits"].

You can read more here: http://internet.seekingalpha.com/article/13313