I've wondered about the crease issue, from a different perspective: that of shipping the fabric. I mean, why would you want to buy fabric that came with creases in it? So I asked for a sample from one of our sales reps, and asked him to just mail it to us, folded in an ordinary envelope, so that I could see if it was possible to get the wrinkles out.
Sadly, as much as I ironed it, with steam, spray, anything... I could not get the crease out. How disappointing!