Studio 1558 WIreless 65 Mbps

Hi

I have a new studio 1558 laptop which has a Dell 1520 wireless a/g/n card in it. I have been on the phone many times to Dell as the status of the card in windows only shows 65 Mbps. On their website the card spec says it can reach 130 but the fastest I have seen it go is 72 Mbps. Dell have also been out to replace the card which made no difference.

I have another Sony laptop which can connect at 150 Mbps on my same network meaning that it is definately something to do with the card in the laptop. I have tried playing with the wireless channels on the router but it won't budge from 65 Mbps!

I told Dell yesterday that I am not happy with this and will shortly be hearing back from them to get a refund. While I wait, has anyone else here had the same issues as me and know a fix? I really like the laptop and it feels like a great shame that I have to take it back because of this 1 fault.

Thanks