Not silks but I'll lend my own insight anyway; it may well be that those you follow are harvesting later than breeder recommendations BUT it's likely not due to a low stress plant training method. LST generally does not apply any kind of stress to a plant whatsoever - hence the term "light". It does allow for more pronounced branching and growth tip exposure thus, resulting in the plant growing outwards moreso than upwards.
Respecting harvest dates in relation to breeder recommendations. It serves the breeders purposes from a marketing perspective to suggest that their strains are ready for chop after X weeks of flowering - the "X" being the shortest amount of weeks they've experienced. That said, I've personally found that breeder suggested flowering weeks are generally understated by about 1-2 weeks on average. It's important to keep in mind that the plants environment and limiting factors such as light type, power, ventilation, indoor, outdoor etc. will play a huge role in determining how long a plant will take to flower. The breeder recommended flowering times are more MINIMUM guidelines rather than a specific time frame written in stone. You also have to be careful here because everyone will start the week count for flowering at different times. I start counting the moment I flip the lights to 12/12 whereas others will only start the flowering week count once they actually see pronounced pistils post-transition. It very much depends and ultimately, the only true judge of the right time to chop will be the grower. This is why I like to refer to picking the right harvest time as more of an art than a specific "time". Hope that answers your question. Cheers.👊
