I have been arguing this for YEARS!!!!
Myth #5: Children who don't nap during the day sleep longer at night. Not so, says West. Skipping daytime naps only leads to sleep sabotage. Kids who are overtired will often miss their sleep window at night, she explains. Miss the window and the body secretes cortisol, a form of adrenaline. As a result, kids will sleep more fitfully and wake up earlier (not later) the next morning.
I was pretty sure that the email was going to contain the same old same junk about sleeping... I was happy to see that was not the case. Most of these I know - mainly from trial and error.... But to me they all ring true.