I tie quilts all the time. I like to tie them inconspicously which is an art in itself........lol. I'm still working on a quilt I started this summer which I am hand quilting and sometimes wish now that I had tied it but it is done with oriental fabric and I wanted it to be special. It is over half done now.
The nice thing is there is not right and wrong way to finish a quilt.......tie it, hand quilt it, machine quilt it.......I truely feel that the quilt let's you know what it wants you to do........kind of zen like......hehehehehe