Facebook is losing teenagers. Among investors, alarm bells are ringing. But…

The Telegraph reports:

Facebook is losing young teenagers. That’s the revelation made by the company’s finance chief which wiped £11.2 bn off its share price yesterday. In a recent survey, the social network was preferred by just 23 per cent of youngsters, down from 44 per cent. The gap is being filled by more lightweight, temporary, photo-focused networks like Snapchat, WhatsApp and Instagram (which Facebook owns). If ever there was fuel needed for the “Facebook is a fad” theory, this is it. Among big investors obsessed with youth, alarm bells are ringing.

For most adults who didn’t grow up with technology, it’s hard to see how something as seemingly pointless, childish and new as Facebook can lose the interest of 13- to 15-year-olds. But Facebook was never for these guys, it was built for students.

Alarm bells.