I would still contact Superior, perhaps they will be able to exchange it for another color instead of black. I'm using a 3000yd spool of Raven right now on my Pfaff 2170, and not having any issues with it at all. Granted I'm not sewing fast but I am chain piecing and my thread isn't breaking between the fabric.
I have heard that darker color thread does tend to break more, because of the dyeing process, and I may start using Greystone exclusively once I run out of the Raven.
When I first started quilting, I always tried to match my thread to the fabric for the piecing, but realized a long time ago, that it doesn't really matter much, as that thread doesn't show, so I just buy large cones of a neutral color and use it for just about everything now.
Diane in Colorado Springs