'Almost half of Catholics surveyed did not know that their church teaches that the bread and wine used in Communion actually become the body and blood of Christ.'
This was a US study into the knowledge of religion comparing that of atheists, agnostics and religious believers. No 'only in America' comments, please, because, let's face it, it is highly likely that there is a similar ignorance of Church Teaching in the UK as well.
The Holy Father very much desires an 'educated laity'. This study gives us more evidence as to why.