Well, unlike what many fans of various models are desperate to believe, no one on this forum or any other knows anything about a model. All we've got to go on are what we can see (which is deceiving) and what people report (which isn't always true); but with Marisa, we're lucky enough to get to hear from her on her forum, and considering that she's personally shot down the implant theory there, the case is closed to me. Could she be lying? Sure, but if it's between believing the haters with their flat-chested favorites and Marisa, I'll go with Marisa.
The top and the camera angle definitely can affect how they look.