Eating a meal in the early morning hours is a modern invention and the first meal of the day was originally eaten around Noon according to historians. What paleo man actually did we cannot know, but it is very unlikely that an early breakfast was on his mind when waking up. The etymological background for the word “Dinner” states that “dinner” mean “breakfast” and that it was the first meal of the day eaten at Noon:

“Originally, dinner referred to the first meal of a two-meal day, a heavy meal occurring about noon, which broke the night's fast in the new day. The word is from the Old French (ca 1300) disner, meaning "breakfast", from the stem of Gallo-Romance desjunare ("to break one's fast"), from Latin dis- ("undo") + Late Latin ieiunare ("to fast"), from Latin ieiunus ("fasting, hungry").[3][4] The Spanish word "desayuno", the Romanian "dejun", and the French "déjeuner" retain this etymology (such as Portuguese "desjejum", while referring to breakfast). Eventually, the term shifted to referring to the heavy main meal of the day, even if it had been preceded by a breakfast meal.”

Dinner - Wikipedia, the free encyclopedia

Personally I am convinced that modern man did a big mistake by the invention of an early morning meal - “breakfast” - overloading his stomach by food in the early hours when the intestines are still busy by digesting and getting rid of food, detoxicating from the day before, and that people should have kept on to the good and proven tradition of not eating any solid food in the AM.

So, what about people in the primal community, do you still eat an early breakfast?