I'm surprised it wasn't longer than that if you downloaded it recently, personally.  I downloaded the Blockchain back in June of last year and it took me about 3 full days, and that was when it was "only" 9 GB.

I'm having to do some troubleshooting stuff to recover my computer from a virus I had earlier, enough that it may end up wiping my drive knowing how messed up Windows is.  Is the blockchain BitTorrent still being maintained?  I'm just wondering because I need to know if I need to make a backup of the blockchain on my hard drive.