I have had the same problem...it comes off with significant rubbing. Let me know what the dealer says if you get any further info...
My 350Z Enthusiast is only a few months old, and I have noticed some
> significant "pilling" on my Carbon Cloth seats - primarily the driver's
> side. It comes off with one of those "D-Fuzzit" combs that my wife uses on
> her sweaters. However, this does not seem like it should be occurring at
> all on a $30,000 car. Has anyone else seen this problem with their cloth
> seats? Is this something that I should mention to the dealer?
>
>