Seriously, all your problems will be gone.
Wifi on the PS3 is terrible.
However, the downloads from PSN are still kind of slow. Improved though.
Laptop Connection: Wireless Download manager used. File Size: 870MB Time to finish download: 109 seconds Average download speed: 7.9MB/s
[B]PlayStation 3 [FAT 40GB][/B]: Connection: Wired NAT Type: Open [DMZ] EU JAP NA File Size: 400 115 99 Time to finish download: 337 sec 106 sec 101 sec Average Download speed: 1.18MB/s 1.08MB/s 0.98MB/s
PlayStation Vita Connection: Wireless (system right next to router) NAT Type: Type 2 Filee size: 30MB Time to finish download: 90 sec Average download speed: 0.3MB/s
Xbox 360 [Elite 120GB] Connection: Wired NAT Type: Open [DMZ] EU File Size: 1.84GB Time to finish download: ~21m Average Download speed: ~1.48MB/s