Yes! I know.
Same room direct line, 90%, But then what is the point!, for this I just run a long cable and connect a Switch.
Same Floor different room 40%, same long cable, and disappointment
Different Floor, 50% almost right under the DAP-1522, less cable and at least I am giving some utility to the DAP-1525
Again now I am just using it as AP, for the 5Ghz for TV,Gaming, Pictures, Music and Movies(xbox,ps3,tv,WDlive)
the rest goes into the 2.4Ghz band