Its quite possible they just don't know. Not a excuse, just a possible reason.
Maybe try Visualware?
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myspeed.visualware.com/index.phpAfter doing the test, click on Graph on the left, then "Click here for detailed analysis" on bottom right. TCP pause can tell you if saturation is the issue at hand. I don't think they would split then combine a node, since that is a costly endeavor, but not to say you could be on the right track.
Also I noticed a large broadcast tower very close to you. Is it possible it could be interference effecting the device itself(but not the WLAN)? Do you notice any weird interference with cell phone or cordless phones? Toasters talking or weird vibrations?