I think so also.I think people like to make up stuff so it sounds like they are in the know.If it works,do it.I'm not always popular at the guild meetings.So many quilt police.I don't always share info either.I usually use "So-Fine"in my bobbin.Just my personal favorite.I use this for piecing also.The finer weight gives me more accuracy.It's complete nonsense that one thread "cuts"the other over time.Who decided that?If they were looking at an old quilt pieced with cotton thread,then maybe the cotton just deteroited.Well maybe.But no one knows.They are just guessing and presenting their thoughts as fact.