the strain that is taking forever is mazar kush. but in my opinion it doesn't matter a whole lot the strain unless you are working with an original land race strain, and I say that because almost all strains now are hybrids having been bred with sativas, indicas, some ruderalis from all over the place! and while a lot of the more commercialized seed companies have their strains pretty well stabilized, there is always a chance of pulling some other recessive genetics, even having a completely different phenotype. sometimes you may have a runt or a deformed plant, you never know what the baby might come out looking like, or how it will act and grow. you just provide the right environment and let the girl do what she knows. I like growing out all my seeds unless they are super stunted or a male, but some people plant a lot of seeds and only take their top looking girls. when you grow all your seeds out you get some funny plants every now and then, like they have their own personality