This is very true. My last grow I did a Re-Veg on 2 of my plants. 2 plants completely filled a 4' x 8' tent they got so big. I wont do that again. I didn't leave any Leaves on the plant. I cut off all the buds & leaves & cut the branches down to about 6" each. In about 2 weeks everything started growing back & the next thing you know the plants were monsters that were a PITA to take care of in a small area.Nah mate once they're rooted up they're pretty indestructible. If you leave a few leaves on after you harvest they even grow back. Thats called monster cropping. Can get the similar results as topping by just tying the branches down so they grow horizontally if you don't fancy it though.
This was just one of the things I heard about so I had to try it & it darn sure works.