Backup download method for slower internet connections

Since the Game Store launched, I've noticed that it's extremely difficult to download Games using an internet connection with a download speed of less than 6 mb/s. On slower connections I noticed the process appears to require an excessive amount of Caching just to get started and makes almost no progress. One thing that would really help is a backup/fallback download method that is more tolerant of slower internet connections and can automatically switch to if needed.