6 1/2 weeks is very young and i woudl not expect a baby that young to give up night feeds yet (obviously a binus if you are so lucky :wink: ). i know how easy it is to compare your 2 children's situations because it is your only frame of reference, but i feel i have to give you a little unsolicited advice: you will drive yourself crazy if you base everythign for your son against whatever you experienced with your daughter. no 2 children are going to give you the exact same experience. it is great that she slept through that early, but if your son takes a lot longer i hope you will feed him when he wakes in the night.
it's not too early for cluster and dream feeds and that can probably help you a bit.
good luck