Thought others might be interested in this article -

http://www.nytimes.com/2013/03/25/health/many-babies-fed-solid-food-too-soon-cdc-finds.html?_r=1&

This might be good ammunition for those mamas who are being pushed by their families and friends to start solids before six months - I know a couple mamas at least have mentioned pressure to start solids. Show them this!