My son is a few days shy of 8 months old, healthy, big for his age (both height and weight), and developing normally.
He started accepting food around 6.5 months (i tried a few times before then and he was not interested, then suddenly one day he loved it), and since then has been losing interest in nursing. At day care, he got worse with bottles, to the point where now they struggle with him for 30 minutes and he takes no more than about 2oz per feeding. We've tried different bottles, even sippy cups, but they weren't any better. They tried offering the bottles at different times, more often, less often, anything they could think of.
At home, he still nurses, but not with any real enthusiasm. He seems to be doing it more for comfort and snuggles than for food. But if you plunk him down in the high chair and pour out a bowl of pureed whatever, he chows down.
All the books say babies should still be getting most of their nutrition from breastmilk at this age, but this baby seems ready to ditch it entirely. Our doctor says as long as he's still growing and seems happy, to let him lead the way, but it just seems so early.