In general Wi-Fi is slower than direct connection always. I don't know about the Router which Q-tel has installed for your fibire, but that might not be going to 100Mbps on Wi-Fi.

To fix this you don't need a router that does fibre, you just need a good router which does faster speeds on wi-fi. Just output the connection from the Fibre Optics Q-tel Router to this new Router.

Other thing to consider is that your Iphone and PSP will also have maximum speed limits.

If you need more help you would need to provide more details on the router model no. that Q-tel has installed for Fibre Broadband.