I did today, and my results are higher than they used to be.

See:

http://stage.results.speedtest.comcast.net/result/473234364.png

If Comcast is your service provider, you can run the test at:

http://speedtest.comcast.net/

You will need a browser that supports Flash (like Firefox). I'm unable to run it with Microsoft IE11.

Also, read

http://lab.speedtest.comcast.net/faqs/faqs-print.php?faq=17