Interesting. It makes me wonder if there is another interpretation of their findings. My first thought was that male embryos are weaker than females. That's why there are more females born and why there are more conjoined female twins who survive than males. I wonder if the higher calorie diet, especially the vitamin fortified cereals, are producing a healthier environment for the male embryos, causing less of them to be aborted in the very early stages of pregnancy. That's just my nerdy scientific mind at work.
I don't each much cereal, but I eat tons of bananas and a pretty high calorie diet since my metabolism is high. Maybe I'll have a little boy running around in a few years