For most Norba and world cup courses, hardtails tend to be faster. This is especially true of western US courses. East coast, not so much. Mt. Snow is faster on a FS I think, as is the Mont St. Anne world cup course.
I have raced on a Yeti full sus for years now, but I'm switching to a hardtail this year because I don't feel the FS is any faster on the downhills, and it sure isn't faster on the ups. For me the positives in the FS lie in techinical, but flat or slightly rising terrain. Going down I'm out of the saddle anyway, and can move the bike underneath me and go just as fast on a HT as on my old FS. It's techy stuff where I have to remain seated, and the speed is relatively high, where the FS has an advantage. Since much of my racing is now done in CO, there is no longer a need for a FS. If I still raced primarily in New England, I would probably keep my FS.
But to answer your question: I'm a hardtail guy now. I like the stiffness, weight, and speed it provides for racing.