I noticed today while setting up a new FreeNAS box that my wireless data rate might be slower than designed. I did an initial Time Machine back up to the NAS box which is connected via ethernet to my AEBS. Over WiFi, MBP right next to the AEBS (5th gen I think, the latest "flat" one, N-speed) and it was only pushing data up at 6MB/sec (according to iStat Pro). When I plugged in the ethernet cable and shut off WiFi, it jumped to 28MB/sec. Is this a reasonable speed over wireless or should I be expecting more? How can I improve it?