Speedtest seems to be pretty close...
Yes, you are correct. Apparently the issue for me is the server used in Greensboro or something here or between here and there that causes some problems in getting even a semi-accurate reading. Using Speedtest and the recommended server city, I received results that were often much too high to be true and that ranged wildly upon repeats.
Now that I re-do the testing, choosing the Jacksonville or Atlanta server at Speedtest, I get more consistent results, which also match up well with what Speakeasy reports.
Speedtest gives me 6788 / 357 (Atlanta)
Speakeasy gives me 6697 / 371 (Atlanta)
My apologies for the blanket statement about Speedtest. I jumped the gun with that comment.

