cnPilot 201 Slow 2.4 Ghz Speeds

We are deploying the R201 for customers that do not have an existing WiFi environment in a rather large neighborhood. When testing on 2.4 Ghz, I am not seeing speeds over 30 Mbs. Is there something I am missing? I changed the channel bandwidth from 20/40 to 20, but that made no difference. Changed frequencies and still no better than 30. Hard wired to the router I am getting 598 Mbs. In looking at the manual, it says it should be able to provide speeds up to 300 Mbs, although I know that is within ideal conditions. Any help would be greatly appreciated.