No, it isn't...
Though it requires quite a lot of berries, I've gotten a Level 2 Lucario/Blissey before.
Berries 21-26 I think... those are the berries that make a pokemon more affectionate at the cost of 10 EVs.
Immediately after hatching, a pokemon has no EVs to lose, so it's a win/win.
At the same time, there are pokemon that can't learn certain moves if you evolve them too soon.
Most of those require evolution stones though.