As a Storage Network Engineer, here are my two cents again. You are spending way too much time troubleshooting something that is incomplete, broken and bugged.
I ran packet captures on the Performance Test and there are no missed ACKs even though the test tells me my packet loss is bad. This is complete BS. Something is wrong with their packet loss detection in the software. I broke the UDP packets down to HEX and streamed them. The Performance Test piggy backs its performance check to UDP packets that are already being used for the game. Something tells me that there is a bad equation in the mix, or their server end isn't breaking down the UDP packets, that contain the test, efficiently.
Wouldn't worry about this Sonovabitch. Not until BF4's issues that are plaguing everyone, are fixed.
Once we get there, it would be worth a second look.
Trying to troubleshoot something that is already broken is nearly impossible and usually ends up in making matters worse.