Kinda figured that. The test sets the link to half-duplex just to test. Darn.
Other than that, the test is showing the round trip only took 10ms. That's pretty darn good. Almost makes me think something is up. Geographically, how far away from the test server are you? (If it even tells you where the server is)
What site are you using to test this, anyways? I used DSLreports