I know some have said that having all 3 devices and running the test can affect the performances when running data. I was hoping to try to run a test that could show what would happen if you were out and happen to be close to other smartphones that might be accessing data.
I will post another video showing how the data performance is, by running the speed test one at a time. I did try that today, and I can say that whether I had all three running at the same time or run speed test one at a time, the speeds didn't not change much; maybe only .04 difference. So having all three running the speed test would only affect around .04 to .06 difference in download speed.
I will also do a test to compare the speed to open browser and going to websites.
Also when I was doing the speed test today with my Atrix, I was using it as a mobile hot spot to provide internet to my Samsung Galaxy Tab, and the download speeds on the Atrix was very good. I got around 3.0 Mbps down and .29 Mbps upload; which is very slow compared to my iPhone 4. Hopefully soon this will be fixed.