Any Routers w/o Neutered Throughput When Operated as an AP?

Any Routers w/o Neutered Throughput When Operated as an AP???

I'm stumped both my WRT1900 units are neutered when operated as an AP.

My observation has been
Router WLAN PC -> AP WLAN PC … 2GB file transfer = 2-4 MB/s YUCK

AP WLAN to Router LAN = 40MB/s
Router WLAN to AP LAN = 40MB/s
Router WLAN to Router attached storage = 40MB/s
WLAN to WAN on either router or AP via speedtest.net = 240mbps ~ 30MB/s

I spent hours trying to prove the poor performance was my error to no avail. Notes here:
https://forum.openwrt.org/viewtopic.php?pid=365698#p365698