Here are the relevant references from the Books where Buxom is mentioned.
I make no pronouncements on these matters, but report them as I find them.
Arrive at your own conclusions.
I wish you well,
Yet there was a vitality, and sensuousness, about her, and consider that vital, well-curved figure, even buxom, so animal-like, one of the sort which might attract lower men, or perhaps even excite unwary, better men in moments of weakness, men were so weak, and note that movement of the shoulders, just then, and, there, now, that way of looking about, over her shoulder, that cunning motion which might deter them from noting the absence of cultivated, worthy personness.
How well she stood, how well-figured she was, thought the older woman, with a touch of envy. That was doubtless the sort of body that men might seek. She herself, the older woman, in her youth, had not been so large, so buxom. She had been small, and delicate, and exquisitely, but not amply, figured. She had been sometimes thought of as "dainty," but she hated that word, which seemed so demeaning, so minimizing. It had suggested that she might be no more than a biological, sexual confection of sorts, a bit of fluff, of interest perhaps, but unimportant, negligible in a way, as a human being. She had once thought of ballet, when she was quite young, before being brought in her young majority into the higher, sterner duties and understandings of the movement. But, too, she had been, in her way, interestingly, though not buxom, or obtrusively so, a bit too excitingly figured for that. Small as she was, and slim as she had been, there had been no doubt about, in its lovely proportions, the loveliness of her bosom, the narrowness of her waist, the delightful, flaring width of her hips, the sweetness of her thighs. She was, as thousands, and millions of others, though perhaps a bit short, and a little slim, a normal human female, of a sort greedily selected for in countless generations of matings and prizings. So, it seems, she was neither excessively buxom, nor, neither, tall, linear, flat-chested and boyish, a variety often praised and recommended for imitation in cultures which encourage the denial or blurring of sexual differences. Rather, she was much like most women, the normal human female, though perhaps a little shorter, and a tiny bit slimmer, that of course on the brink of her early womanhood and beauty.