Hi all,
interesting thread on that Hobbit comment, a couple of points to throw into the mix;
In the translator conceit The Hobbit was written by Bilbo so perhaps reflects more of his personal stereotypes than otherwise. Saying that, Thorin of couse did prove to be a hero in the end.
Also Thorin's gang were a party of exiles, perhaps too used to living on their wits (and occasional coal-mining

) to throw themselves too wholeheartedly into danger. Notably Gimli is the classic heroic Dwarven exception. One thing that comes to mind is that Gimli was a Noble of a settled dwarven society, therefore expected to lead in the fighting, whereas Thorin and co., though descended from Nobility, aren't currently in charge of anyone much, so have no expectations of heroicism put upon them.
I guess the contrast might be between, on the one hand, if you like, a 'hasty' hero such as Eomer, who is suspicious of Aragorn at first but is soon convinced and, you get the impression, would go into battle at the drop of a hat (OK I'm thinking slightly of Cohen the Barbarian and d'Artagnan too here

). On the other hand we have the Dwarves, who are capable of heroic deeds but it seems only when they have chosen to do such things.