After surfing google and coming across this forum, I decided to sign up and offer some information, since I am a student of the art in question.
I've studied the art, Chong Shin Kwan, from a competent instructor in Princeton, WV. I was only able to attain the level of 4th kyu/gup (blue belt), but have learned a lot about the style(s) and can pretty much answer any questions you might have about it.
As for it being a "Korean" art, there is a large emphasis on the TKD aspect of striking. There are more korean forms to learn than from Karate. But that's really about it. And students do learn more of the korean forms first before they venture into the traditional Karate forms. It's name is considered to be Chong Shin Kwan, but one would not be wrong to call it by it's Japanese name, Shoshin Kan (means the same thing). In fact, we learn about as much Japanese terminology in the class as we do Korean. This all could be due to the way my teacher runs the class. I don't know much about how Sensei Jarret runs his classes, being that I've only really met him a few times. He always seemed like a good person when I've met him.
As for the class itself, there's more emphasis on Karate/TKD, but there generally is a large effort to combine the striking of those styles with the throwing/locking of Judo/Jujutsu and Aikido. Weapons training is also a large part of the training, as most of our bo forms are korean (coincidentally, that's how I found this forum. I was looking to see if I could find anything on the Chong Shin No Kun form for the staff).
But once again, if there's any questions I might be able to answer, feel free to ask me. I've been training in martial arts since I was knee high (I'm 22 now) and Chong Shin Kwan was the first system I picked up.