ennay-I agree with you.
My son, now 5, went trhough a stage where he would not eat meat-from toddlerhood until he was about 4. It was because meat requires so much "chewing" and when you swallow it, is isn't dissolved as much as fruit, grains, etc. are. It was a texture thing.
My son ate a lot of yogurt, peanut butter, and other things to get protein instead. He could very easily be a vegetarian.
My kids are all thin-my daughter wears an 8 slim. They eat a LOT. It isn't genetics (because I have weight issues, and dh can gain weight if he doesn't exercise, etc.) it is because I have always given them healthier foods, and they are active.
They have kids exercise videos, they have a swingset, they walk with us outdoors-they do active things.
I went as a chaperone a couple years ago to a farmer's market with my daughter's class...and the farmer was showing all of the kids the produce. What astonished me, was how many 5 year olds knew what a basic potato and an apple were-but none of them knew what a bell pepper, a kiwi fruit, a mango, and other fruits and vegetables WERE, and had never tasted them!!!!!!! I bet, however, that they all knew what a donut and Lucky Charms were.
I think that parents learn SOOO much from their families about nutrition and physical activity. My inlaws think I am torturing my kids-because my son enjoys chocolate soymilk, and he eats raw blueberries like they were M&Ms. He always has.