Internet is slower all of a sudden..

[Drumm]

There was an episode of Hak5 where they covered Bandwith throttling from your ISP, Personally, I don't think your connection is bad (I can struggle to get 0.1mpbs at times, with pings at around 3000+)
I quote:

Go to Measurement Lab and click on test your internet connection. Choose the first one: the network diagnostic tool, and click on Start. This test will look for your internet connection speed and anything slowing it down. The test takes about 20 seconds. Once finished, click on Statistics to see a detailed guide of your network traffic and how it may be limited. Next, run the Glasnost test. This test will look for traffic shaping when you are using such things as flash video or BitTorrent. This test takes about 8 minutes to finish, and make sure any downloads you have going are paused. When this test is finished, it’ll tell you if it detects any kind of traffic shaping happening when using the selected program. The NPAD test will find and diagnose any problems in your end machine that have to do with network performance. Run this one and it will send and receive data, then show you any problems in red. Pathload2 is a bandwidth test that will find out what your available bandwidth is. For this test, you must download the EXE and run the test. The last test through mlabs is ShaperProbe- a traffic shaping test. It’ll tell you if your isp is traffic shaping when you upload, download, or both, and the max burst size before shaping begins. You also have to download the EXE for this test as well, click start, and wait for the test to finish. Next is the Switzerland test. Download the .tgz or .zip over at Sourceforge. Extract the files from the folder and read the INSTALL.txt for information on how to install it on your specific platform.

The MLab tool, they talk about is a tool released by Google to test if your bandwith is being throttled. You can find the website here.