DOES SHE SHOUT WHEN SHE SAYS THAT TOO?
Sorry, but caps-lock does violence to my eyes!
I think the position she holds ("most women don't like it") is hard to prove either way. One could do surveys, but the real issue is that EVERYONE IS DIFFERENT (caps intended) in their approach to sex and oral sex in particular. I have known and loved women who absolutely love giving head, so I can say that they DO exist. I have also loved women who don't prefer to do it, but saved it for special occasions or meaningful moments. So I know that your wife is not alone. But to make a general rule, seems like a mistake to me.
Anyone who bases their position about what they will or won't do with/to a loved one, on what OTHER people will or won't do, seems to me to be very sex-negative and normative, where they care too much about what is "normal" as if other people actually saw and cared what a private couple does together. I think there is too much of that poor attitude in the world, to my tastes.
I say, it's all about what the 2 of you like together. Pay no attention to what's "typical" because that's hard to define and always changing.