I wish it was out sooner too, but if the extra month means fewer bugs and some quests and content not getting cut because it couldn't be fixed I'm all for it. That said I'm actually worried about how this will effect Pillars of Eternity. Obsidian has said they're working their release around DAI and Nov 18 doesn't give them a lot of room left in 2014, which they've been adamant about sticking to and not doing some post Dec 25th style release either. So that really means it gonna release in that Dec 9-23 range which still isn't very far after DAI. Delaying doesn't do much for them either since The Witcher 3 will be out in Feb, but maybe a mid Jan release would be best for them.
They already have my sale since I Kickstarted PoE, but I know I'm going got start playing it until I've exhausted DAI first and I bet a fair few other people will do the same, especially those who haven't backed it yet and will have to buy at launch.