Not sure how you explain the network speeds but I typically use roads and cars as analogies.� your network speed is the Autobahn but your device is a Ford Pinto.� The Autobahn is capable of you driving 500mph but your ford pinto only lets you drive 80mph.� This typically gets through to customers that don't understand their network speed for me anyways.
I use the same analogy, and it works pretty well... But people can't believe that their latest and greatest i-phone is anything other than a Bugatti.
I've been playing with adapters and handhelds. I'll look into the Netgear.