Karzai reportedly did not respond favorably to Ambassador Eikenberry’s comments, and has refused to meet with any US officials since. Though the US has publicly put on a brave face with respect to the vote, and Richard Holbrooke has repeatedly praised it, privately it is becoming increasingly apparent that it is putting them in an awkward position.
What put the US in this "awkward position" was making sure that this election re-appointed Karzai, and that really representative candidates were barred from being on the ballot at all.
If there is any "power-sharing government", it will be in name only, and purely cosmetic.
The Afghan people are, rightfully, resentful of this pre-ordained outcome, and this "election" may spawn demonstrations and riots which the US and UN troops may find themselves unable to control, without killing a massive number of non-combatants.
That will only further radicalize the Afghan people against the Karzai government.