Do Insulating Paint Additives Like Insuladd Work as Advertised?

There are many makers of so called "insulating" paint additives that claim to reduce energy bills by up to 40%. Some of those making the 40% claim have reduced it down to half of that in recent ads and studies show that if any energy savings are possible they are much less than even 20% as claimed. Many are sold through network marketing and all claim to be NASA spinoff companies. Here is a detailed article with more about insulating paint additives and whether you should waste even the $12 per pack (for one gallon) that they charge or just scoop up some dust from behind your refrigerator and throw in your paint can.
http://ehelpfultips.com/do_insulating_paints_really_work.htm