MGirl,
Since dyskeratosis congenita, like aplastic anemia, is a rare bone marrow disease, there's probably a fairly small body of knowledge about response rates and timing after transplants, especially with the latest drug combinations.
I hope you find other parents with whom you can compare treatment and recovery time. Although responses can very greatly from person to person I don't blame you for being frustrated and feeling that your patience is running out, especially with your daughter continuing to have a low ANC.
In addition to asking here, you might contact
BMT Infonet in case they can give you useful information. You could also talk to the Aplastic Anemia & MDS International Foundation about its
Peer Support Network, in case they know another family with a similar transplant experience, even if it's for pediatric aplastic anemia, not dyskeratosis congenita.
Have the doctors indicated that the adenovirus might be partly to blame for your daughter's delayed recovery? If your daughter's recovery continues to be stalled, what do you think your choices are?