Agree with 411A.
If given the choice, I prefer to climb at best rate (Approx V2 + 100kts in the 747, so that will vary from about 235kts up to about 275kts) for the birdstrike reason and I also think that by getting the plane above 10,000' as quickly as possible helps reduce the fuel burn, as you're buring a LOT of fuel down low.
(Can't back this up with real figures, I'm just guessing based on when I used to fly a Citatio 2. We used to use a little bit less fuel by doing it that way and it didn't hurt the sector times that much)