I did use her technique for my last two quilts and one had a flannel back. The technique works well, but I thought it was better with the regular cotton backing. Starch the mess out of that flannel as well. Good luck with your quilt!!
Here is the link for my flannel backed quilt:
http://www.quiltingboard.com/t-73761-1.htm
Just FYI - I won't use flannel as backing again - we just don't play well together - LOL!!