pipesinperu, the fold and stuff does concentrate the flavors and gives a cooler smoke which is why people use that method. I still use fold and stuff when I am smoking outside as I want a slower burn if there is any kind of wind while I am smoking. I use the cube cut most of the time as I smoke indoors most of the time and I do get the concentrated flavors and cool smoke that the fold and stuff gives. I find I get a more consistent burn with less relights using the cube cut method and I find no loss in flavor or cool burning. For my tastes fully rubbing out a flake makes me lose flavor and gives a hotter burn which is why I never use it. Broken flakes I just cut into big chunks and stuff them in making sure it feels like I am sipping a milk shake through a straw.
A good flake pipe will smoke a flake great using either the fold and stuff or cube cut. My favorite flake pipes are group 4-5 size, they weigh in at 38-55 grams and my favorite shapes are Dublins, Apples, Billiards, Rhodesians, Brandy's, Calabash, Lovat's, Pokers, Cherrywoood's. I also make sure the bowl width is .75-.82 and the bowl depth is no greater than 1.7. I also prefer pipes with a shank dimension of .4 to .45. The open shank gives a nice dry smoke.