Whenever you cut the top back on any plant, you should cut the roots to keep things proportional. The same as if you cut the roots, you should cut just as much mass from the top. I've overwintered without cutting back roots with some success but the roots really have no room to grow and the size of the pot is always too big and you'll have to pot up to an even bigger pot in the spring.
I downgraded from a 5 gallon to probably a 3 gallon pot and during the winter very little water is required, and no fertilizer until spring.
There is no way I could wait till February to cut back with my climate. I cut back in October, and the plan this year is to give them very little light starting immediately after cutting back. Too much light in the fall(or winter) will start leggy new growth and you'll have to cut the tops back again.
Oh and Chiliac, your link doesn't work