She looks good. The main reason to top when the plant is a bit bigger is as you already said, to make sure it can recover faster. Topping when the plant is smaller will just add some extra time to the recovery vs if you waited to top. There really aren't any other negative side effects of early topping as far as I am aware of. I usually wait until node 5 or 6 has formed and then ill top down to the 3rd node.