King Arthur created steampunk?

source io9:

You probably knew that authors like K.W. Jeter helped create the genre of Steampunk, which eventually became the publishing and fashion juggernaut we all know today. But did you know that King Arthur played an important role in the genesis of the genre? Tim Powers explains in a new interview.
I think Powers' argument is a bit of a stretch, but *hell*  it's Tim Powers ( The Anubis Gates (Ace Science Fiction) )

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