When my first was born, I experienced this "firsts race" right away. There were friends whose kids talked first, was potty trained, ate solids first, first, walked first, ect...it was pretty comical at the time. A close friend of mine had a DD about same age, 3 months older to be exact. When our kids hit pre-school age she was in a battle at her job's daycare for her DD to be placed in all day in Kindergarten to "beat" out the rest of the group back in the town's Pre K. I often listened to the tales of how she was reading and writting in her journal and was on a 1st grade reading level & mom was so happy she won the battle to get her into Kindergarten early! So my son goes to Kindergarten finally and it is only half day, but he loves it! Gets all his HW done in poacket on first day, loves to play and show-n-tell. He is not at all about the bussiness. By 3rd grade, the teachers and principal are asking him to try harder on the state test, he doesn't write enough and they can't get a clear picture of his test grade even. Friends daughter is miserable in school because her mom wanted to make sure she had a "serious" teacher so made sure she requested the teacher all the kids hated! Fast forward to Middle School and HS so I don't bore you, my son receved Math Awards and Silver award for GPA and high proficiency on state tests, he is in all accelerated classes now, and friend's daughter is miserable and hates school and hates that her mom pushed her. She maybe going to Summer school.
My own DD started gymnastics at 5, ok, early, LOL, but has repeated 4 twice, 5 twice, maybe even will do 6 twice...who cares as long as she is going at the pace SHE wants to go at!
Moral of the story? Life is not about the race, it's about the adventure, the ride...kids are hard enough on themselves, be the parent, the cheerleader, the supporter...without the pushing!!