Marissa Mayer Gives Herself an 'A' for Yahoo's Progress on Mobile

At least one person is a big fan of Yahoo's performance under Marissa Mayer in her first year as Yahoo CEO: Marissa Mayer

During Yahoo's second-quarter earnings call on Tuesday, Mayer broke down Yahoo's business into four categories — search, mobile, display and video — and noted that she and the company deserve top marks for making progress on mobile in particular

"I grade our progress on mobile as an A," Mayer said. "We invested heavily and are seeing incredible growth as a result."

In particular, Mayer highlighted the fact that Yahoo now has 340 million active mobile users and has grown its mobile team by a factor of six in the past 12 months, going from "dozens" to "hundreds," thanks in part to Yahoo's acquisition of 16 companies