Possible Clues:

• Appraised too highly
• O, a girl reckoned a boy too high
• Not all it's cracked up to be
• Given excessive merit
• Not as good as claimed
• Too much has been made about the hidden trade
• Too highly valued
• Thought too highly of
• Like talent, in a Geoff Colvin best-seller
• Ended trade organisation that's made too much of