Slow Download, Fast Upload

I just moved into an apartment in Seattle and am subscribed to Comcast high speed internet. My download speed is only 0.25 Mbps, while my upload speed is around 3 Mbps. I should be getting 12 Mbps download according to Comcast.

Are there any tools I can use to tell if my neighbors are just being greedy (the network is bogged down), or if this is something specific to my connection only?

I had the same problem with a Linksys E1200 router, Comcast internet, and a Mac. The solution for me was to disable the WMM feature in the router's advanced settings. I discovered that here: http://brikis98.blogspot.com/2012/02/got-slow-download-but-fast-upload.html?m=1