Sure, if I am not at home then I will need to transcode the audio track I want to listen to to something more bandwidth friendly (it converts the file on the fly to OGG or AAC, whichever the browser supports) but if I am at home on the same network then having to wait for the track to transcode (admittedly only ~3 seconds, but he is still more than 0 seconds) and losing quality in doing so is a waste