First of all, I know that wifi tethering is the best in terms of speed. I'm just curious as to why my iPad 3, which has Bluetooth 4.0, does not go over 2 MBps when tethering with my iPhone 5. I also tried it on my old iPad 2 and got the same speed as with the iPad 3 and the iPad 2 has Bluetooth 2.1. This doesn't make sense, wasn't Bluetooth 4.0 supposed to improve speeds up to a maximum of around 26 MBps? I'm not expecting that speed, I just expected it to be a bit faster than Bluetooth 2.1, maybe 4-5 MBps.