I do like the image of Sauron stomping up and down cursing about the stiff necks of Dwarves. :)

I don't think the dwarves mentioned much of anything to Thranduil - Thorin told him they didn't attack, they were starving, and wouldn't answer the question "what were you doing in the forest in the first place" with so much as "trying to get to the other side", and it says Thranduil got 'little more news out of [the other dwarves] than out of Thorin' so I doubt they had any chats about Elrond. They were pretty much refusing to tell him anything.