Approximately zero downloads in the first 2+ days would kind of make a joke of a gradual roll out that is supposed to be complete in 10 days.
I was relatively patient until they announced... now they have committed, they should either publish an "Oops, we were a little premature," or release it as THEY reported.
I won't even get into what hell I would have to deal with if I refused to give my users an anticipated release date for new functionality until the day I was ready to release. Then, as if announcing at the last second wasn't bad enough, they don't follow through with a significant roll-out... not a good business model.
But, I will wait the 10 days they have committed to before I worry about it too much...