Greg Scoblete sounds off:
Rubin does raise a significant question ... regarding U.S. policy towards Tunisia.
It could be, as her source suggests, that there exists a wellspring of knowledgeable people in the U.S. federal government who understand Tunisian society and have a keen grasp of how to ensure that the country's revolutionary tumult is channeled toward a stable, sustainable representative democracy (provided it's not too Islamist, of course). If that is the case, telling whatever government does emerge "what we expect" makes some sense, as it presumes we know what we're talking about.
If, however, we don't actually know what's best for Tunisian society going forward, outside of a general desire for it to have a representative and relatively liberal government, should we really be butting in?