I have my MBP in the kitchen along with my iPhone. They both have full bars on WiFi and never drop out.
I bring my iPad into the living room or kitchen and it drops out all the time. Even in my room it will disconnect and say "connecting" 4-5 times while using safari.
I've restored the iPad as new, I've tried reseting network connections in settings. Power cycled my router and modem.
I was having issues with my iPads wifi connectivity as well. Apple knows what the problem is, it's a design issue with the iPad. That black plastic apple on the back of the iPad is the only entry point for the radio signal. I can be in the same room with both my iPad and iPhone and my iPhone gets a much stronger signal then the iPad does. So it's not a router, channel or security issue. My resolution was to purchase a Hawking Technology wifi repeater. I keep it in the room where I use my iPad the most and my connectivity issues have gone away.
I disagree that its a set hardware issue or else the issues would be seen by mostly everyone and thats just not the case. I have heard of some people having a ton of issues and exchanging it and then having no issues at all. I would say return it to Apple for a new one and see if that helps.
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Apple TV 2010 iPod Classic - 80GB Black MacBook Pro - 250GB Aluminum Unibody
I would say to just keep adjusting network settings and see if you can find a combination that will give you more stable results. I was using WEP on channel 11 initially, and I was getting drop outs constantly. After I changed it to channel 8 and WPA2, I haven't had issues since. Just keep trying.
WiFi issues are an ongoing battle for iProducts... I have my iPhone literally 5 feet away from my router while I'm in bed and it still has trouble loading videos, even while it claims to have full signal (and, my internet is 25mbps).