Looks like you have already finished Xmas shopping, so you were looking ahead and asking about buying a Wanderport technology based water heater by Dec 25 2013 ? I bet NO. Dave M once said he wants to field test the units before they go into a production run for distribution . . . so that adds what ? Something like half a year in itself ?
IMO extended reliability testing is needed not just for the reason(s) Dave M cited, that being primarily that the last thing wanted is to have to do a recall during product introduction, but also I feel that the only hope to gain decent market share is by showing reliability, low maintenance, and long lifespan. Those all require extensive testing to be believed.