K-girls as they are known on this board, in my experience, are not very prevalent in Manhattan. It could be too expensive, and a support network might not be there. They are in the NYC region, but as you mentioned, in NJ. I don’t think the touring girls stop in Flushing either, because it’s not as close to the Korean populations in K-town in Manhattan, or the Korean populations in Northern NJ. I could be incorrect about this, as I don’t go to Flushing.
Are there Koreans working at AMP’s in Manhattan? Yes, but they are likely not touring girls, and not working at exclusive K AMP’s. As IMP post mentioned, the exclusive Korean places are gone. I don’t know exactly why, but the C AMP’s look to have muscled them out. I only know one exclusive K-girl agency who has Koreana, but she has been here for years, so she’s not a touring girl. There just aren’t as many Korean provider as Chinese provdiders in Manhattan, and that explains the premium price mentioned.
However in NJ, there are two agencies that have touring girls. One of them has lower prices now, closer to the rate mentioned in the original post. If you were to compare K-girl services and rates against C-girl services and rate in NJ, you would probably see a premium for the K-girls.