As usual Brick Top is on point. Both about breeders and the bud growth of the Lemon Skunk. First about the breeders.....
From my experience of growing strains from different breeders I know exactly what you are saying when they "dip into their own genetics" for new strains. The result is many strains that are more or less the same. I think Nirvana is guilty of this big-time. Green House maybe a little but not as much as Nirvana. I've grown a few Nirvana strains and a few Green House, among others. The Nirvana strains may LOOK different from eachother but all the buds had a similar taste and smell which was a big clue that they shared genetics. How many reviews have you guys seen of Nirvana strains where the reviewer says they smell and taste like Fruity Pebbles cereal? There's tons and they're all of different Nirvana strains. The Green House strains I grew on the other hand were quite distinctive from eachother so Arjan hasn't totally muddied the waters yet. Whether I liked it or didn't at least each GHS strain seemed to have it's own uniqueness.
Now about the growth of the Lemon Skunk.... what Brick Top said is very accurate. Looking through my journal when I first grew these strains is hilarious. I was super happy about how all the other strains were growing nice big buds but I was consistently hating on the Lemon Skunk until the last two weeks of flower (which for me took 9 weeks total BTW). It was such a stretchy and frail grower with slow bud development but then in the last two weeks the buds explode with new pistil growth and rapid calyx formation and this strain ended up being my favorite of the pack. In the end it looks like a puppy whose ears and paws are too big for its body. The thin stems can barely support the oversized buds. By no means a "large" yield but more than I was expecting early on. So yea don't expect great things from this strain until the very end.
RELATED SIDE BAR: I had mentioned to Brick Top elsewhere that I regretted the decision I made to quit cloning my Lemon Skunk. Well happy news, I cut a branch off the last remaining LS plant when it was at day 34 flower and I actually got it to root. So this strain will continue to be a part of my garden