According to the Ex, Muni is slightly rerouting the last bit of the 9X to touch down in the sliver of Daly City near the Cow Palace. And with that change, they're going to call it the 11X.
Not sure why the designation change was necessary, but this extra extension makes a lot of sense for this heavily-used downtown feeder express. The new terminus at Geneva and Schwerin streets is technically in Daly City, but that's something of an arbitrary distinction in this part of town. In addition to the operational improvements that the Examiner article mentions, the extra few-block-jaunt will connect downtown SF to a new pool of residents near the Cow Palace.
Of course, it only makes perfect sense for the T-Third to be extended past this stop and down Geneva to the Balboa Park-plex. But this is a small step in the right direction, all the same.