And since a picture is worth 1,000 words, I just took a photo of my Biota YT and compared it against a photo I took when I first put them into the tank.
I should have taken some photos when they first arrived but the first photo I have is after 20 days of QT, but in my memory they looked about the same after QT as they did when they arrived. All 3 were happily eating nori/live algae and frozen foods from the moment they arrived.
Taken May 25th, fish about 1.5" long:
Taken right now (about 4" long):
(Note: This may or may not be the exact same fish but all 3 tangs pretty much look the same)