Exactly, that was the point. Even Mark Zuckerberg primarily focuses on Product and Platform, whereas COO Sheryl Sandberg focuses on other Biz Dev things.

(From: http://www.nytimes.com/2010/10/03/business/03face.html)

"Ms. Sandberg has focused on building the business, expanding internationally, cultivating relationships with large advertisers and putting her polish on things like communications and public policy. That has freed Mr. Zuckerberg to focus on what he likes best: the Facebook Web site and its platform."