Facebook (s fb) CEO Mark Zuckerberg wanted to do a little myth-busting on his company’s second earnings call, and the biggest target was the idea that it didn’t know how to make money on mobile. Zuckerberg’s basic sentiment: we’re doing real revenue on mobile and we’ve only been at this for less than a year.

Facebook said mobile ad revenue for the third quarter was 14 percent of all ad revenue, or $153 million. That’s after introducing sponsored stories in February and more recently rolling out mobile app install ads for developers who want to promote their apps. Both of those ads show up in the newsfeed for Facebook’s mobile apps and website, which don’t include traditional banner ads on the right column.

Sheryl Sandberg, Facebook’s chief operating officer, said mobile users were engaging with those mobile ads eight times more often than desktop ads and brand recall was 10 times…

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