I dont know about you guys but downloading anything from the marketplace takes forever. I have found a way to speed up this process. I found it out when i was downloading something and I exited out and went back to download it later. The percentage complete went way up since i last saw it.
Here's what you do:
1.You start downloading an item
2.Wait till it gets around 20%.
3.Hit "Cancel Download"
4.Go back to the download and hit download again.
For me it goes from 20% to around 50%.
I don't know if you guys knew about this or if it was old news.. just tryin to help ya out!