Do newer MBPs have better wireless network cards/antennas? I am not able to find this anywhere, and Apple does not advertise beyond that their notebooks are capable of the various specifications. Right now, my 2009 MBP is having trouble staying connected to the wireless router while a 2012 MBP stays connected literally two feet away. Admittedly we have a serious Wifi jungle here with at least 13 networks available. This is just very frustrating.