It all depends on the individual themselves. I had a session with a provider that offered both. I requested an all Greek session in which see agreed, About 20 minutes into the session she couldn't go anymore. Greek isn't for every provider.
I'm going out on a limb here and say 50/50 on my on stand point.
When I couldn't get it, it's all I thought about. Then I found someone who let me have it any time I wanted it, then it wasn't so special any longer.
It depends on how often you get it, I guess.