Perhaps the discussion of the D7800 should be split to a separate thread.
I think all current Lantiq devices are based on the VR9 family, the VRX268 or VRX288 chips, which have been around for a few years now.
The D7800 uses the next generation Lantiq chip, VR10 family, it's the first device I've seen that does:
IPQ8064(CPU) + QCA8337(Switch) + VRX320(DSL) + QCA9982(5GHz) + QCA9880(2.4GHz)
The DSL firmware contained within the Netgear firmware image is:
dsl_vr10_firmware_xdsl-07.07.04.03.00.07_07.07.01.08.00.01.bin
HH5A - Lantiq VRX268
HH5B - Broadcom