Yesterday when I was playing with my stats, I watched the "spinning wheel" of Libsyn stats go round and round and round and round and round. I literally left and exercised. When I came back it was still there. I click on "Stats" and it instantly displayed. Go Figure.
According to a recent post on their support blog, a new (faster) version of stats is to be launched on Monday. IT appears you will now get more information about Zune, Apple TV, and other agents as well.