> "Do you know many 13 - 16 year olds?" Admittedly no, but aren't most children on their parent's cellphone plans? I would expect the cash strapped ones to be

> "Do you know many 13 - 16 year olds?" Admittedly no, but aren't most children on their parent's cellphone plans? I would expect the cash strapped ones to be in their early twenties, but I'm not seeing that in practice. I suspect the value in whatsapp is in something other than limitations of SMS, but I can't say what.