Project Phoenix, a game from a dream team of JRPG developers, was initially gunning for a 2015 date based on their initial Kickstarter predictions, but now they are aiming for 2018. That's quite the leap! The problem stems from a programmer who was previously developing other projects, and still hasn't been able to join the project full-time.
There is also a "no refund" sentiment going around too. According to the team, "To initiate refunds is to give up on the project since there would be no money left to complete it." I definitely get that people will be angry and want their money back, but that's part of what you're gambling on with Kickstarter.
These days, I don't pledge unless I'm ok with a late release.