Right now Genesis integration data is not available in Discover. Example, post-impression data from DoubleClick can not be utilized inside Discover. I'd love to create segments with that kind of data, but can't because its not in there.
We integrated SC data with ExactTarget email data. Aside from the fact that the process was very bumpy, and not well coordinated between the two partners, we realized after the fact, that none of that data was making it's way into Discover.
What is most frustrating about this experience is that the Email attribute and metric names that were created using Genesis, actually show up in Discover; there just is no data to populate them!
I have seen a similar issue with SearchCenter data in Discover. All the metrics and classifications are there, but the data is empty. I think this can be resolved by support.