Could not agree more! With my first, he was chunky until he learned how to run then it melted away. He is extremely active now for being almost 6, running around all the time. Between his father and I, we are both tall and slanky.
Now my girl, who will be 10 months soon, her father (new daddy) was worried we fed her too much a couple of months back, so we trimmed down abit, and wouldn't you know it - every night she would scream and be hungry. I went against mothers instinct, never again. She now eats 3-4x a day (depending how long she is awake for), but normally sleeps 10/hrs a night, and as since she was 5wks old (how lucky am I?).