in my opinion, it is a nice way to keep the males 3 weeks aside the females and then,introduce them in to the flowering area.
you will get more pistils ,hence more seeds.
Yes it is true they will take longer ,but not much more : on average , hybrids take 7 to 9 weeks to be ready to harvest by our standards ,but that doesn’t mean you can go any further .
Saying that, If you do polinice at the third, it does give plenty time to the seeds to get proper ripped, maybe not all will be fully developed, but a good amount of them will have that proper brown colour.
I don’t like to use the first male, yes ,it indicates fast flowering, but doesn’t mean is the best one to work with,
The ideal scenario is to have 4 to 5 males and some cuts of each of them aside, turn them to flora and see what is the best one that fits in to your breeding and after that ,use it to pollinate everything you want, the male selection is just the same way yo do with the females look for things you want to keep on the offspring , tests them and look for dominances
I know nature does things differently ,but as we are creating the best environment for the plants, why not also create the best scenario possible??