the (density) of the quilting- how close you need to quilt your quilt--
is totally dependent on the batting you choose-(and your preferences)
the batting will tell you on the package if you need to quilt the quilt every 2" (very dense quilting) or up to 10" apart...and any number in between.
it is necessary to read the batting packages and choose one that meets the quilting you want to do.
warm and natural (or most batts with scrim) can have up to 10" between stitching lines--hobbs heirloom cotton batt has to be quilted at least every 2".