I am not a BT Junkie by any means but if there is any test you would like me to run just let me know and I will be glad to try it out for you. I have essentially the same setup you are looking at. And yes, it is an Atheros chipset (or at least I use ath0 for all my commands)
MBP 2.4GHZ 4GB RAM Santa Rosa 15" Matte Display




