If the FR is installed with the wind deflectors it is one of the more quiet racks available. If you are always running the rack empty then you will notice a difference - if you usually have something up there then less so.
Tire selection makes a larger impact on road noise though so be cognizant of the amount of gains you will see. We are a FR dealer and I've installed a dozen racks the past year and yet I still run a G4 rack on my own 110... Though I always have a tent on top so the rack provides protection for the leading edge of the tent/buckles, and a place to mount lights.
On the 130 we run FrontRunner cross bars and when rebuilt I plan to move the FR rack from the bed to the roof.