Have to agree. Was near the captain at Cyseal Harbour, and one of his crew kept exclaiming to another NPC, "Remember that time when he--?!" You hear the same comment half a dozen times in 1 minute--it gets quite irritating. Also agree that it picks up too many comments at full volume full screens away (ie when you meet Arhu).
Just a thought--if there is concern that delaying NPC comments excessively would make it difficult for players to experience, maybe it could be voiced only every 3rd or 4th time. The text can still display as frequently as it does, only without the VO most times.