I just found this site and can hardly wait to do a ITH quilt.

You are correct.

While developing Bursting Bubbles, (the newest release to include this technique) we found that great results can be achieved by applying spray starch and pressing the fabric before it is adhered to the freezer paper. Two benefits of starching earlier than shown in the video are - fewer steps and no waiting for the piece to dry before returning to the machine.

very good

This appears to be made with freezer paper, not butcher's paper.