This story is completely mis-leading. They certainly had users before 15 days ago [1]. The product was developed in an incubator in the Winter 2009 class [2]. They have relaunched and revamped it, but to start from a clean slate and say you had zero users with no disclosure or information about your past makes this story blatantly false. It's a shame because it still would have been a good story without the reset.
[1] http://www.startupnorth.ca/2010/11/03/has-kik-finally-arrive...
[2] http://velocity.uwaterloo.ca/alumni/kik-at-blackberry-devcon