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because pruning to me, u dont cut the main tip off completly, you cut a bit off to encourage multiple main growing tips,
but dont quote me on that smile.gif
no, that's a technique known as fimming.
sorry to disagree with you all but afaik topping gives you more grow sites but the overall yield is smaller. pruning is generally taken to be removing lower limbs that aren't getting enough light to be useful. if done early enough this will increase useful yield since the energy that was going to the smaller buds is now available to the rest of the plant but done when well into flower will slow the plant down for a couple of days and the net result would be a small loss of final weight of bud.
fim is generally accepted as an abbreviation for "fuck i missed". when taking out a bud site, only the top 2 thirds or so are lifted off, usually with a thumb nail and the bit of growth left on the plant grows multiple bud sites. it's a bit hit or miss but an interesting experiment.