“Their word”? They specifically said:
NASA will take into consideration the results of the voting. However, the results are not binding on NASA and NASA reserves the right to ultimately select a name in accordance with the best interests of the agency, its needs, and other considerations. Such name may not necessarily be one which is on the list of voted-on candidate names. NASA’s decision shall be deemed final.
They should call it Serenity. Of course, this is coming from an ardent Browncoat. I think the whole name-it-Colbert thing is kind of dumb. Also a bit egotistical. I like Colbert, but I think he’s somewhat overrated. Popular, yes. Good, yes. But more popular than I can personally stomach at some times.