I can tell you I can get good shots in church at 200mm (as well as 320mm, on a crop) at 1/30 on the 70-200 F4IS.
The non IS versions need much faster shooting. I don't own any of them.
I also own the 85mm 1.8, but I will always reach for the 70-200 if I can. On a full frame results are just spectacular.