Um, well no... As far as I was aware, Bravissimo simply provide underwear for women with a larger bra size and don't claim that this is necessarily indicative of being 'real, normal, or curvy'.
Whilst I agree that the majority of women needing a larger bra size are unlikely to be the size 8- 12s that the models are on the website, I really cannot see how a bra alone would really look any different on a woman with 38H breasts on a size 8 body than they would on a on a size 16 body.
Of course, the stomach, arms and waist will be bigger, but how does this affect the appearance of the bra in any way? A bra either fits or it doesn't- my stomach size does not affect the appearance of my underwear at all, meaning that whilst the lovely slender girl with boobs the same size as me looks better in her underwear than me, ultimately, our breasts look roughly the same in that bra!
As I said, I can understand why it would be important for clothing, since the appearance of clothing IS dramatically affected by the weight of the wearer, but breast size is not.
Oh, and nice comments about 'real' women not having toned arms, tiny waists and flat tummies by the way.