I have BeThere internet, with max 24Mb downstream and 1.3Mb upstream. I'm using the included free Speedtouch 585v6 setup in bridge mode acting as the modem. The modem always syncs at ~17.5Mb downstream so when I used to use the Speedtouch as the router and the modem I used to get downloads at 17.5Mb i.e. 2.1MB.
With the DIR-855 I can only get a maximum download of 13.6Mb i.e. 1.7MB. I've confirmed this with a number of different full-speed sources over the last 6 months: high-speed good torrents, extremely high-bandwidth servers e.t.c. The Speedtouch still syncs at ~17.5Mb, and even just now I tested it in router mode and I get the full speed it syncs at. Any ideas why the DIR-855 cannot use the full 17.5Mb that the Speedtouch syncs at?
P.S. I've tried modifying and turning off QoS, with no effect