I have the new 15" Haswell rMBP. But my wifi speeds are really slow compared to my other electronics. I have a ASUS AC66U router, and my HTPC that is running a 866mbit 2 antenna card is outperforming my rMBP by a lot. Some times my speed is as low as 25mbit out and in. While my HTPC gets up to 97mbit out and in. (100mbit maximum internet speed). Also when i move files from my NAS my HTPC moves it at around 25 megabytes/s. But my rMBP mostly caps out at a few megs... They are both in the same room. Im not that great at Macs yet since I'm new to them. But what can the issue be? And what can i try to fix it?