After an hour of trying different methods of connecting (assigning statip IP, putting PS4 into DMZ, using powerline adapter), I've come to the conclusion that the PS4 has the same horrible wireless network connectivity that plagued the PS3. No matter what I tried on the Wireless N front, I could never get better than 5Mbps down according to the test. Using the powerline adapter, I was about to get 10-15Mbps down consistently. I also tested downloading a game (PS4 version of Flower). Using the powerline adapter, the download finished almost 10 minutes quicker than on Wireless N. Powerline adapter: 12 minutes. Wireless N: 21 minutes.
What's really puzzling is that every other 2.4Ghz N-compatible device I have in the house always hits 35Mbps down when doing speed tests from various servers. I know that Sony states that the numbers are "Estimates Only," but I'm going to go out on a limb here and say their wireless NIC isn't very good. I know this may seem like I'm ranting, and I probably am, but I find it amusing and frustrating that my $70 Bluray player not only gets better connectivity to my network, but also supports the 5Ghz band.
Maybe I'll look into getting a 5Ghz wireless access point and set it up as a bridge to see if I can bump up the speed.
PSN ID/XBOX Live! Gamertag: BiffCo