Right now the boundary for restrictions on commercial speech seems to lie right around labeling for GMOs. Calorie labeling is okay because its purely informational, factually neutral, and has a direct link to a real concrete government interest. GMO labeling is on the border because there is a strong political element to it, and there is no proof GMOs (unlike too many calories) are actually bad and therefore it does not implicate a government interest.

I would think the FTC's action is substantially over that line.