We wake our B/G twins every 3 hours during the day to feed (9am, 12, 3, 6, 9) and then at night, they typically go 3.5 to 4 hours in between feedings.
Our son is pretty alert after some of the feedings, but our daughter never is. She even eats with her eyes closed most of the time.
Just wondering A: your schedules at this age and B: if you have a lazy twin as well
Re: 4 week old's schedule
yup that about sums it up