Yeah, as far as cleavage is concerned, my breasts were really *firm* for the first couple years, which meant they wanted to make "nipple silos" sticking straight out instead of letting me squash them into cleavage.

I'd say it was at least 2 years before it didn't take some heavy-duty bras and a tight shirt on top to get good cleavage; even at a 38D I still couldn't usually manage it.