No Dolby Pro-Logic II CD? (XM Radio using Neural Surround)

[kfbkfb]

I haven't seen any CDs (or other stereo media) labeled as
encoded for DPLII Music Mode decoding, is there some
problem with DPLII Music Mode?

http://www.dolby.com/professional/pro_audio_engineering/solutions_surround.html

http://www.prnewswire.com/cgi-bin/stories.pl?ACCT=104&STORY=/www/story/12-28-2005/0004240115&EDATE=

Why is XM using the surround sound system from Neural rather than
encoding for DPLII decoding?

Kirk Bayne