Google vs. Bing

[CsmBill]

We rolled out a new site for a customer on an old (branded) domain (14 years old) about 3 weeks ago, and we are doing very, very well in Google for 40+ keywords, but we can't make a dent in Bing. Absolutely nothing. We are using the Webmaster tools for both. Are we missing something? Are we not using the Bing Webmaster tools correctly?

[ClaireH-184886]

we have done well in both but recently after we had our site updated to a new site, we have done much better in Bing than in google as well as yahoo.