I am surprised at all these responses. There is no 'grey area' regarding feeding solids in any of the major American or international medical communities.
The universal recommendation is that a child be EXCLUSIVELY fed breastmilk until six months of age. This means nothing else, no cereal, no water, no nothing. Following these giudelines can greatly benefit your child's health, both in the short term and for the duration of his/her life.
That said, of course every child is unique with unique needs and a unique timetable. Only you can be your child's expert advocate, and only you can know what her stage of development is for sure.
My oldest child started cereal at 8 months, and then we took it very slowly...he needed time. Our youngest's first 'meal' was at five and a half months and he virtually snatched an apple out of my hand to gnaw on, so I put a piece into a mesh feeder and let him try it. He's been an adventuresome and hearty eater ever since.
Glad things are working out for your child, but for those of you out there looking for advice, please consider the medical recommendation as your first plan of action.