Carronades rewarded close-range fighting

What did Nelson think of carronades, given HMS Glatton's performance at Copenhagen?

Carronades were effective weapons if a ship could close the range, as the question's Glatton example suggests.

HMS Glatton's carronades were effective weapons when a ship could close the range. Their value therefore depended on tactics and handling that brought the enemy near enough to use them. Glatton's performance at Copenhagen supplies the example raised in the question. A carronade's reputation cannot be separated from the tactical position required to exploit it.