I recently upgrade our service to 500mbs, and this is what we are getting from the modem ethernet port (10GE).  If I connect the computer to one of the ethernet ports on the main deco (2 total) the speed test is only getting around 200-250Mbs.  Via wifi I am able to get 100-150 if I am lucky but sometimes around 50-70 is not a typical.  About 12 devices connected to the satelite unit and 7 to the main unit.

Is this what I should expect?  Can it be improved and what settings should i be looking at?  I know wifi speeds can be tricky and alot of things can factor it, but for the ethernet speeds should it not be closer to what I am getting at the modem port?