It depends for me. Sometime I can get the beer fairly bright in the fermentor and fine it in the bbt and have in ready in 48 hours or so. On beers that clarity is not an issue I can rack over to bbt, carbonate in as little as 8 hours and be kegging the next morning. Which is why if you are a production facility it's good to have wheat beer in the mix.
dark beers are more haze tolerant as well.
But, the same strain I use for my wit I also use for my higher gravity Belgians and that strain is a b1tch to clear and sometimes it takes me a week or longer in bbt and several finings. Have a dubble that's giving me fits right now.
I really want to move toward filtering my higher gravity Belgians but have avoided it thus far. Only a matter of time though. I also have an extra 30 bbl bbt on order and that will take care of some of the log jams due to beer clarity and tank time. Plus, if it really becomes a problem ( like the dubble I have sitting now) I can filter from one bbt to the other. I'm thinking this will alleviate some of the headaches involved with filtering from fermentor to bbt. Sean may correct me if I'm wrong since I'm a filtering noob. But ime you always get a plug of yeast from the fermentor no matter how much you fine and dump.