loss of foliage is gonna lead to stress and possibly stunting, if they lose too much, more stunting. this can be seen with mothers(more so will smaller ones) after taking many cuts, i wont see as much overall growth for the next 2-3 days, of course after topping the plant usually responds by sending more energy to other branches so the energy does seem to become divided and harder to judge its rate of growth, but it certainly seems like less is goin on for those few days, ive also noticed the stunt more with less resilient strains, and it seems more noticeable when they are smaller and dont have as much foliage to spare.