I wouldn't say they become more potent, but if you let a plant veg longer, lets say 60 days you veg for, the plant will work to its pull potential and produce bigger buds. If you let it veg for only 25 days lets say, the buds won't be as big as the 60days veg. I think either way the buds will be just as potent, the yeild just won't be as big.
so lets say i kept it in veg for 120 days.. i'll way more bud??? is that the equation? more days = more bud?