Hi all. My 13" has a max transmit rate of 300 on the 5ghz band, whereas my other machines have a 450 transmit rate reporting. Can anyone tell me if they are seeing the 450 on their new machine (hold down option and click the wifi icon on menu). If so, can anyone advise why I would not be getting it? Detailed approaches are appreciated. (It is a new APX and Time Capsule) btw and both are working fine with MBP's @ 450 transmit rate. Thanks!