Quilt judges normally don't critique what is used for the back.
However, if the back is pieced there may be comments on the workmanship of the piecing and how it effects the overall stability of the quilt. Such as, if it is seamed in the center, is that seam straight with the edges of the quilt. Did that seam produce a bump that effects the visual effect of the front. Comments related to the back are usually related to other aspects of the quilt - pleats from quilting, loose strings, knots showing etc.

I will follow this thread, thanks

Holice, thanks for letting us know.

Good to know

At the judging lecture I attended in April, the NQA certified judge said this is what judges look for in regard to backings:
If pieced, is the piecing well done?
Is the fabric a good choice?
Does the backing fabric “go” with the fabric on the front?
If there is “back art”, is it well handled?
She also mentioned that there are no longer any “rules” about backings; that center seams are okay and piecing is okay.

Interesting.

Thanks!

Hmmm... good to know.