Not sure I agree - I certainly feel that the early weeks are when a dad is pretty redundant, other than supporting the mum as best he can, and obviously changing nappies and rocking the baby when possible. In the first few weeks the baby is so much almost an extension of the mum, that we dads have to recognise that and just do what we'are asked to do. I spend my time (we have a 7 weeker and a 21 monther) with the older one, because I can actually do things with him that are "useful", while I can't help feeling tha there's not much I can do with the younger one other than help out when requested.
Basically what i'm saying is: if we can help, ask us, but it's not easy when the baby really just needs its mum.