If anyone was in doubt, here's todays confirmation on German 'PC Games' magazine site that DTP is releasing Gray Matter on the 29th October in Germany, Austria, and Switzerland:
http://www.pcgames.de/Gray-Matter-PC...ktober-664534/
I guess you can now fully blame Lace Mamba for the very unfortunate choice of words - seems like they have screwed up entirely on their own. Or maybe that was DTP's GOG-like stunt right before the premiere.