I'd imagine its plenty enough for a home internet router, but it stings a bit to pay ~$150 for a system with a 2013 CPU (and a very low end one, at that).
OpenBSD will run fine in this role on sub-US$50 refurb Core 2 PC or a sub-$100 Atom box if power is an issue. Even a P2/P3 can keep up with anything but the highest end broadband.
I installed OpenBSD on an APU2C4 and it has been rock solid for the last year and a bit.
In terms of cost you will be hard pressed to find a x86 SOC with 4 I tel NICs and a serial port at a cheaper price.