I can definitely confirm this, at least in The Netherlands literally everybody uses Whatsapp and it has slowly become a verb - "I'll whatsapp you the details!".
It's far from the best messaging app, but definitely the most popular (in Europe).
It's far from the best messaging app, but definitely the most popular (in Europe).
i work on an im client[1], and my mom sent me a link about whatsapp :)
[1] to be fair, verbs.im is a gtalk/aol/yahoo multi-protocol client. infact, one day we could wrap over whatsapp as well. not exactly re-building a new graph but re-using your existing lists.