SearchEngineWatch reported on Netratings score of the on-line searches for Arpil 2006. Google has now reached 50% (http://blog.searchenginewatch.com/blog/060526-090731). This compares to comScore reporting they represent 43% for the same period. No matter how you look at it, Google is the most popular search engine at least in the US. No wonder every SEO targets Google, but do the math, if you can rank well in the other search engines, you'll still reaching 40% or so of the potential market. So if it's easier to reach 40% then to reach 50% where do you put your effort?
It's just something to think about. The reality is you need to know where your target market is searching and not just be fixated with Google.
By the way, for those in Canada here are some stats that were given to me by Google Canada.
Reach December 2005
Google - 66%
MSN - 14%
Yahoo - 13%
Hmmmm, looks like Google has a strangle hold on Canada.