I picked one up at UK retail off NAP. The next morning they had all these Arty rings at 50% off. Annoyed. Anyway, I finally received them all and played around with them last night. I would say they are TTS. I bought some size 4s and some size 5s as I'm in between 4 and 5 (which is about a J-K) in normal rings, and as expected I am between sizes in the YSL Arty.
I'm not sure what the official colours are called because NAP doesn't call them anything.... Arty experts help me out!
Please let me know which colours you like the best. I don't think I'll keep all of them as 6 is a tad bit excessive.