I've never had a problem either and I never pre-wash my fabric
I'm stitching my current project on a really stiff smoke grey aida from Charles Coats (I think) and while its softened slightly, its still really stiff compared to what I am used to. I haven't found that it shreds or affects the threads at all. Sure I catch the edges with my threads or with my hands/arms but never painfully and its never left a mark
It can be a struggle getting it onto my qsnap to start with, but then its on, there are no problems at all
Gorjuss - New Heights
2014 finishes:Kinkade's Beauty and the Beast, Love blossoms wedding sampler.