X10 R9000 wired network running at 100Mbps

I recently bought a X10 R9000 router to replace my old WNDR4500 N900 router, also from Netgear. I have Cat 6 or better ethernet cable running from the cable modem to the router and from the router to two computers. 

- When the WNDR4500 was installed, I could achieve ~80 - 100 megabytes per second transfer rates between my two wired computers (~gigabit speeds)

- The leds on the old router indicated gigabit ethernet connections

- I installed the R9000 in the same location and did not change any of the ethernet wiring or the gigabit switches I have in place

- The R9000 shows white flashing leds for the two computers, indicating gigabit ethernet connections

- When I transfer a large file, the speed clearly tops out at ~10-11 megabytes per second, like it's hitting a hard limit (looks like ~100Mbps ethernet)

- I disconnected everything and connected both computers directly to the router using Cat6 cables and I still see the same transfer rate limit

- I turned off any QOS settings I could find, but no change

I have already checked for new firmware (none available yet). Do I have a defective R9000? I'm really considering returning this and waiting for a less buggy AC7200 router to come out. At this point, my expensive router looks like a downgrade.