Well since no one responded yet let me do it. In this case it doesn’t matter how fast your connection speed is. The downloading of the cache is done through peer-to-peer connections. You can compare it more to the famous torrenting softwares used to download certain files. If there aren’t enough PC’s seeding the files you won’t download anything. There are already lots of people trying to make it easier and setup nodes to host these cache files for download. Anyways the following links explain it a lot better than I could.