Are the Cobalts coated? I don't think they are but oddly enough, someone at EBMM told me they were???
I don't think so. They are not marketed as such, but you bring up a good question. They are not coated like Elixir, which have that really slick feel. Cobalts are very rough feeling, like stainless steels. They could be 'coated' I guess...but in a different way than Elixirs. I've never played the coated EB or D'Addario bass strings, but I do use the coated D'Addario acoustic guitar strings and you'd never know they were coated by feeling them.
They are priced about the same as D'Addario coated strings, you could be onto something there. Come to think of it, their muted top does sound like what you'd expect from a coated string. That being said, the coated Elixir Steels are a good bit brighter so I don't want to throw a blanket over all coated strings.