Glad to hear she's such a nice girl. I really hope she does well. It can be really tough to get weight under control - but it is possible. It is more a mental and emotional issue than physical - and those are more difficult issues to deal with.
Several WTA are significantly overweight (Pavly..., etc.) and can still win on tour. However, I'm hoping Taylor Townsend can become great, to do that she will have to get in shape.