I just checked four manuals from Pioneer Europe--the 2011 manual for the BDP-140/440/LX55, the 2012 manual for the BDP-150/450, the 2013 manual for the BDP-160, and the 2014 manual for the BDP-170. The 2011 and 2012 manuals mention that PQLS only applies to the BDP-440/450/LX55. The 2013 and 2014 manuals, like the manual for the US model BDP-80FD, doesn't define PQLS, but briefly mentions it. Now it's starting to look like we have PQLS consistancy between the BDP-80FD/160/170. So if anyone gets a BDP-80FD/160/170 and discovers that PQLS doesn't work with their 2010-2014* Pioneer or Pioneer Elite receiver, Pioneer needs to be notified to revise the manual!
*For 2010 receivers, in order for PQLS to work, set the BDP-80FD/160/170's HDMI audio output to PCM. For 2011-2014 receivers, you may set the BDP-80FD/160/170's HDMI audio output to Bitstream or PCM.