I have never had good results with the PS3 speed test results either wired or wirelessly even after hooking it up direct without a router. I think their test is just crap to be honest. I will have a 20 mb/s download speed on testing via my iphone, ipad, pc, and then get like 1.6 mb/s on the PS3. I stopped worrying about it. I play games and stream video lag-free even with those test results.
55" LG OLED | Networked Yamaha RX-V573 7.1 AV | BIC DV-32CLR Center | JBL 2600 Mains | Fluance AVBP2 Bi-Pole Surrounds on Soundcast SCS-100 wireless surround | 15" Polk Audio Sub | Networked Sony BDP-S590