I concluded a year ago that this was a lot of smoke and mirrors, mostly depending on the obvious square function of the formula for energy storage vs. voltage. However, several people who actually have worked with pure barium titanate note it's highly non-linear characteristics, i.e. its dielectric constant drops dramatically as the field gradient increases, an effect also known as dielectric saturation. It gets right down to atomic level physics.
The reduction in capacitance at stated voltages is so great that the claims appear to be overstated by a factor of 100 or so! To make this work they are claiming they have overcome the fundamental limitations of this material. The patent spells out part of it but does not prove it actually works.
Anatoly Moskalev gave some great analysis in this link:
http://www.teslamotors.com/blog2/?p=46 (search for "About EEStore supercapacitor hype")
If correct, these guys are still using non-proven hype to attract capital. If any single investor has not had the device actually proven for both energy density and voltage, they are taking a huge, huge risk.
Personally, I hope we are all wrong and this thing actually works. It would be a HUGE advance. However, I'm not investing nor holding my breath...