"When ROIs rise, it gives us more flexibility to do more things with the same amount of money," Kerho says in the article. "When ROI declines, I have to take money away from another project and change the project mix."
Now, while very few people ever tried to claim that Microsoft Live Search was a rip-roarin' killer search engine, 23% is still a very impressive performance increase. And as CIOs and IT organizations get more deeply involved in revenue-generating facets of their businesses, that type of edge can't be overlooked.
The article notes that another agency has also experienced an uplift from Bing: "Efficient Frontier reported a 13% increase in paid-click share for Microsoft during the second week following the launch. New data shows that as of the first week in August, Bing lifted click share 44% since the beginning of June."