SW development being behind schedule? *Gasp*, never heard of it before.
Except at RockPaperShotgun
Well, to be honest, I never took the dates as more than rough guides and maybe hopes. I have been surprised, however, by the number of developers whose games I backed and who sent me invitation for Beta in the last month - and I really do not have the nerves for beta-testing in my spare time right now. Some developers, unfortunately, do send updates on what they do only very seldom and do not show progress videos or so.
But in the end very much of the kickstarter projects is a matter of faith. Often there are new guys (and I tend to back more of them than established studios), trying new things. If the result will ever be finished, let alone be fun to play, cannot be certain before. One can hope and back, or doubt and not back.