The twins can now go 6 hours without feeding.

Actually DS1 goes about 5-5.5 hours and his twin goes about 6.5. We can usually time the feeds so one of us goes to bed at 11 pm and wakes up around 4-5 am to do the morning feed while the other spouse can "sleep in" until 7am. Yesterday I did not get out of bed until 7:30 am because both kids slept a little longer after the 4 am feed.