In my scenrario I couldn't break 150mb on wifi when the AP itself could speedtest at 350+. Interestingly enough when I turned off meraki standard traffic shaping for the SSID I'm using as my test case, speeds doubled or came close to max for 2x2 streams. This includes testing at fast.com, speedtest.net and other major testing sites. Hopefully that helps others as part of their troubleshooting...
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