The updated press release today makes public the first significant 3rd party validation of EEStor's technology. There are no known dielectrics with these properties.
According to Rudyard Istivan, a competitor to EEStor Inc., "the announcement is impressive" and may cause him to rethink some of his future investments in his own company.
Temperature coefficient is an indicator of voltage coefficient in dielectrics. See audio interview at TheEEStory.com.