My breasts got anime-huge when my milk came in so we went to see a lactation consultant...nothing wrong (ahem! reeeally? how about not being able to wear a shirt???) It did turn out my son was nursing an average between 21oz to 23oz per feeding! (i THINK the average is 4-6oz.) We nursed for 9mo. and then switched to formula...& I've never seen such a look of confusion as to when he got to the end of the bottle!! It's EMPTY??? At that point he was drinking at least one can in addition to what he ate. He never fussed for food either, BUT he'd do bambi-eyes and this lip thing. If we ignored that, THEN he'd fuss. Since he was "asking" we gave it to him.
Long story short, all the wrinkles and rolls melted away as he started to shoot up around a year to a year and a half...and his doc and we have to keep an eye that his body fat % doesn't get too low. About half the time he eats twice as much as I do, and the other half of the time he eats less then half what I do. This is all pretty par for course for my nordic/scottish family.
I should add....
My son was 10lb 4oz when born, and 23 inches long
He is now the size of an average 8 year old (at 6)
I'm the "shrimp" in the family @ 6'1"
While there's "average" there's also average for culture & ethnicity. We're off the charts as far as america is concerned but happily in the middle of "average" in Norway. If your friend's male contributer to the gene pool wasn't 6'9" I might worry. As it is....I'd wait a year and see. :)
-anecdotally- my sister is the only one of us the pediatrician at the time put on a diet as an infant(we had different peds, navy family)...she's also the only one of us with a significant weight problem.
May peace always find you, even if you're hiding :)
Z.