yeah its fairly common , doesnt always mean more yield but certainly can , if you do the math it should come out like a plant and a half worth of yield , but thats given the fact it grows as vigorous etc as its sisters you would be comparing her to
i recently tried to reveg a photo plant that grew that way but its lower buds were filled out too so i cut too much not leaving enough green for the reveg to take place , i was actually going to start a breeding project and try to make the trait dominant , from now on ill pay more attention to the plants in veg lol but it can be hard when growing big numbers
usually the plant grows out of the trait and any ive noticed have , minus the one i wanted to reveg , it kept the trait right through its entire growth/life , thats why i wanted to reveg it , because its the only one ive personally had that kept the trait and didnt grow out of it
peace