I made an all-grain coffee stout with a little molasses. Used S-04 yeast. When I bottled it, I filled all the requirements for priming sugar - this is my 20th plus batch of beer. I tried a bottle after a week and there was no sign of carbonation at all. Usually, it is either ready or there is partial carbonation. Do stouts usually take a while to carbonate? My OG was 1.061 and F.G. At bottling was a steady 1.010 for four days.