The gaps between DF versions have been of more then one year before, yet the idea of DF being dead never came up apart from one or two fearmongering threads on the DF general discussion forum, since toady made sure to keep informing us of the progress. Hell, the only times in which such few threads came about was when toady became silent for a whole week or more, which only ever happened when he was sick or on holidays with his family.
Now lets consider things within the context of TWS. Josh was doing somewhat regular updates on the project, warning people about delays and throwing out videos and screenshots once in a while. Even if there were multiple delays regarding the posting of videos and stuff, people were still ok with it, since he was still communicating with the community. Then he suddenly kind of disappears for more then a month, and the interval between any info becomes several times longer then it used to be, to the point the community have to seek the help of people other then Josh to actualy get an idea of whats going on in the development.
Its completely justifiable that the community went all doom and gloom and started asking for refunds after all of this. Communication today is incredibly important to keep interest in game development projects, and even more so for kickstarter-born projects. Look at the Pillars of Infinity guys, they made sure to release regular updates and videos regarding the project to keep people interested. Even when they basically had nothing to report, the devs would still entertain the community with stuff like lore and answering backer questions.