I was never a fan of T/G's, and still resist doing them. No matter the pace, the student will feel rushed, simply because of the mechanics involved. Other maneuvers, like flying the length of the runway at 6" AGL, are much more effective in teaching landing sight picture and offer more options to fly, touch, roll, lift off, etc. Moving cockpits are horrible places to teach, and any attempts to convey meaningful information to the student are much better accomplished while stopped and hopefully unpuckered.
OTOH, I've found that many pilots want to be in the airplane rather than at a table, so I tell them "we have some stuff that we can do in the plane" and make sure the plane is parked in the shade. Then we sit in the cockpit for however long it takes (including pit stops) to do everything I wanted to accomplish.
When it's over, I just say "well, this took longer than I thought, but you made great progress" then we climb out of the plane, shut the doors and go home.