I read earlier posts that state it is a known issue that the RV042G doesn't provide the full bandwidth offered on the WAN port.I upgraded my firmware to 4.2.3.03 that is the latest available. The release notes state that it does resolve the WAN issue...

Hi,I have upgraded to the new RV042G to take advantage of the gigabit ethernet speeds and to prepare for when our ISP upgrades our bandwidth. I currently use the RV042 with ProtectLink enabled to filter out various categories from our network traffic...