Clergy on the 10 commandments and the Lord's prayer

This is amusing yet concerning. Derek Wilson writes in The People's Bible: The Remarkable History of the King James Version,

As late as 1551, Hooper, the bishop of Gloucester in the process of a visitation of his 311 clergy discovered that 168 could not remember all the Ten Commandments, thirty-three could not locate them in the Bible, ten were unable to recite the Lord’s Prayer, and thirty-four did not know who its author was.

10% of your clergy not knowing who gave the Lord's prayer is a little on the high side, especially when there is a clue in the name. Kind of like not knowing who built Noah's Ark, or what is the colour of greenstone.