We had reservations at CB a few days ago and were rather disappointed that they stopped the antipasto lunch buffet. Our waiter informed us that this change happened 2 weeks ago. We still enjoyed a bottle of wine, a platter of artisan cured meats, and a small plate of 4 different types of cheese, all at a rather hefty pricetag of 85 Euros... The restaurant was packed at around 2pm with the who's who and very important looking non-tourists.
Who knows, it could have been a strategic manuever to keep the tourists away :)