Drag taking was suggested once, and no one seems to have noticed it, I have seen it mentioned on "treadleon" forums and I looked up some old singer material where they were resisting the reverse "phenomena" saying that a drag tack was stronger and faster. i have also heard that many times if you damage the fabric by dragging on it, then your foot pressure is to high, and that many people run it to high as a matter of course. I would assume that FM quilters are an exception to this ;-)