Yup, permethrin is mentioned in the article :
4. NEVER use flea control products that contain "permethrin" on your cats, unless they are specifically labeled for use on cats. There are some products that are labeled for use on cats that contain small concentrations of permethrin, usually less than 0.1%. When used according to the label instructions, these can be used safely in cats.
However, there are many permethrin products available over the counter for use on "dogs only." These contain high concentrations (45-60% ) of permethrin insecticide. These permethrin products have a good range of safety when used on dogs, but, even a few drops of concentrated permethrin could be lethal to cats. The reason for this species difference is yet unknown.
Exposed cats can develop uncontrollable seizures within hours of concentrated permethrin application. Some may tremor for several days. The fatality rate of untreated cats exposed to such products is very high. Proper treatment by a veterinarian can often prevent death.