Well it is true that you see a lot of Christies in tournaments but it's more evenly divided in DOA compared to other fighters. I've read a few of the interviews on here and almost all of the top players don't even provide a tier list because they think all characters are viable.
At first people were posting their tier lists, but after a while, people stopped doing it after a certain person got flamed for their's (I think it was after mine that people stopped bothering with it).