Look at the dailies for those: It's exactly true. I mean, we are only 6 hours into the first day, and there are more days in Pantheon than for those others but look at everyone's first day on those graphs. These are really interesting choices for examples, btw. Ignore Star Citizen, however, as a model for anything. That is an MMO-esque game from an industry legend in a genre with almost no entries and a funding model that lends itself to contributors making multiple purchases that made more last month than they did in the KS campaign. It has appeal as both an MMO and a single player game, with nostalgia as well as a working alpha footage that looked incredible. It scales from Privateer-done-modern to replacement-Eve and is all things to all space-sim fans.
-Camelot Unleashed raised almost 25% of their ending total the first day. They raised another 20% of their funding the final 48 hours.
-Pathfinder Online raised almost 21% of their ending total on the last day, mostly because it was going to fail to be funded; they were like $135k short of their goal going into the last 24 hours.
Both of those still came in at around 110% of their targets.
There is a fair amount of research and math on this. I am not saying that anyone should start worrying yet, at all. In 42 hours from now, though, we will be able to estimate within a couple of standard deviations where it is going to end up, barring something last minute like Pathfinder Online.
Edit: Pathfinder also had an ala carte item/reward bolt-on system as well. Right now, there isn't much to bring existing contributers back for add-ons, and these are folks you don't want one-and-done-ing this.