It's not controller or PS3 limitation... it's BLUETOOTH LIMITATION.
Wii use Bluetooth with a custom protocol created by Nintendo... Sony use the standard one which is limited to 7 simultaneous connections.
Bluethooth on cellphones, notebooks or others devices had the same limitation (7 simultaneous connections).
And Xbox 360 uses Wi-Fi (812.11) protocol (not bluetooth)... so no limitation for Wi-Fi (812.11).







