Linux has the best Bluetooth stack of any of the current three operating systems. Which is kind of a depressing statement, but it's actually feature complete.

You really don't want to know just how bad Windows' Bluetooth stack is. It doesn't even implement basic features. I would hesitate to call it a compliant implementation at all. Oh, the API call for all BT features exist, but they either do nothing, return garbage and lies, or are just broken.

If you use a well supported BT adapter under the right Linux distro, it's flawless.