Atheros don't claim performance improvements that I've seen just from their website, I guess a developer has great access.
However, one of the Atheros features that should improve performance is in all their recent radios, "XR" (= eXtended Range).
That works by improving receiver sensitivity beyond the normal threshold limit.
I did campaign to have an XR (on:off) switch in MT, but it's not there yet ...
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