I am not implying anything. Growing any crop will always be a compromise, always. Give a fruit less sun light and it will take longer to ripen, the same is true any flowering plant. A less than ideal temperature will also have an affect. Also I will add that the breeders generally give quite a wide range on their predicted timings. I am currently growing Sweet Zombie by Expert Seeds. According to their website it should take 49 - 56 days to ripen. On Thursday mine will be two weeks over that, but I did have a few days where the tent was a little on the cool side so that would have slowed things down. I am in a new tent with new lights, it took me a couple of weeks to get the distance from the canopy to the lights spot on, this would have had an affect. I had a little nutrient problem early on in the flowering cycle, mostly because of me trying a new medium and a new brand of nutes, I identified it and rectified it very quickly and all was well again, but it would have had an affect.
The difference between a professional grow lab and a grow in someone's closet or tent is like night and day. Dutch Coffee Shop weed is some of the best in the world if you go to the right places. Sensi Seeds let you have free samples of whatever they were growing there and that was the best damn weed I have ever smoked, barr none. These guys had to compromise nothing.
As we are dealing with a plant their will always be variables, some within our control and others not.