Evidence? Does it have to be scientific?
It's supposed to rank at the top among the clubs of the same group as indicated by the price. People said it chooses the girls first from the supplier among its sister clubs as well.
I went to Macau KTV clubs frequently until about 2 years ago, mostly Fortuna and China City. The senior manageress I know well in CC moved to Deluxe and only left her assistants to look after the clients in CC. So I went there a few times too, girl quality was top notch but that was 3 years ago.
issue 151> The reason why people go to KTV instead of sauna is the communication. So language issue is very important. They do have some big city better educated girls, not just village farm girls, so they might know some basic English. Then of course there are the occasional Russian, Korean and especially Mongolian, who were quite common a few years back, not sure about now.