Does anyone have any information on PTFC coatings on cookware? Recently I was at Williams Sonoma and saw their new "Gold Touch" line of cookware, which is advertised as having a non-stick ceramic coating. When I saw this I contacted the company to find out if it was a nano-ceramic coating, because I'm concerned about nano-particles and want to limit my exposure to these. They wrote back and said it was not a nano-ceramic coating but a PTFC coating.