Seem like I have different experience with them. I don't have issues with Android Bluetooth, I do have issues with Apple bluetooth.
Half of the time, my iPad couldn't detect my bluetooth devices (keyboard and audio accessory) are trying to connect to it (already paired). When that occurred, I have to go to the Command Center to force connect my bluetooth devices and half of the time iPad will obligate and connect. Other time it just give up and said couldn't connect or cannot find it (while my bluetooth device is poking iPad to connect). It is a hassle to use my bluetooth devices with the iPad daily.
On the Android side, it instantly connects, even my phone is sleeping.