Are you on some bad DSL or something? The game is supposed to be about 50 GB in size. Over 100 hours (1%/hour), you'd be going at a DL rate of 1.14 Mbps, or an entry-level AT&T connection (probably the 1.5 Mbps service). To contrast, I'm on Comcast. We have a 75 Mbps connection that usually runs at about 90 Mbps. You're never really going to get the Xbox to leverage the entire connection on a DL, but let's say I can get half of it going, 45 Mbps. That'd make the game take a hit over 2.5 hours to install.
Now, there was something on the main WC site about how the game was taking well past 100% to install, but since you made it sound like it didn't progress to 100%, that's probably not the same story here. I'd just guess you have a mediocre DSL connection, which you can check at Speedtest.net by Ookla - The Global Broadband Speed Test.
No i'm using optimum's 50Mbps.. If i were to download something on my computer it would download the full 50Mbps.
it's just the xbox downloading this game.. every other game i've downloaded went full speed.. not sure that is going on