Local Businesses focus most attention on Google for their local marketing campaigns. While this makes a lot of sense with most local searches still going through Google, Bing is coming on strong and should also be considered:

Search Engine Optimization Tips for Local Businesses: Don’t Forget the Bing

“For many local search marketing campaigns, all of the attention is given to Google. While this makes a lot of sense with most local searches still going through Google, Bing is coming on strong. Already, Bing is increasingly integrated with Windows 8.”
http://www.digitaljournal.com/pr/1306953

 

So diversifying your efforts makes more sense, in order to increase exposure for your local business marketing campaigns.

Search Engine Optimization Tips for Local Businesses