For him to have vocalized his remark was wrong but is it really that uncommon for masseurs and escorts to have a preference, granted they will never say anything or refuse to work a certain body type. Pan is not raised in American culture he is Thai and probably came here in his 20's. I know Asian culture and to call someone fat really is not that uncommon, I remember cousins saying to me I got fatter.
For American culture mentioning that is taboo but I don't think so much so in Asian culture.
Just my thoughts. I would not necessarily hold it against him. At least for me that did not show in his work to me.
Actually I would rather someone tell me they prefer not to work on HWP than to just go with it to make the buck. After all, I prefer to hunky guy to work on me and if Asian that is a bonus is it wrong for a masseur to have a preference?