Isn't that a bit like the recipes that say prep time 10 minutes but you are supposed to be cubing 2 pounds of beef, chopping 3 onions, slicing 6 carrots, thin, mincing 4 cloves of garlic and slicing a pound of mushrooms. Might as well tell you to do the ChaCha while you're at it.
I'm slower than frozen molasses. I took a class once from a designer and her signature pant, called One Seams as there was no outside leg seam, just a right and left side and the designer could make them in 45 minutes. Most of the class finished up a pair the first night and made another better fitting pair the second day. Moi? I took about 3 months working on them at least once a week.