The acquisition of wqxr.com was just part of the deal. I've found it redirects to wqxr.org now, this was likely done for continuity purposes.
Regardless of whather it is in stereo or mono, the processing of the sound is the best I have heard on any Internet stream, any format. Rivals accuradio.com in quality even.
The AAC+ feed is labeled wqxr.aac by the way. It's not connecting properly in an old Win2K that I have Winamp 5.541 installed on presently.