No need losing sleep over this.
Prominent hybridizers have methods that they use. Not all are the same and it could depend on their growing zone. We have been fortunate through our daylily meetings and travels to have been given details from a few of these successful people. I know multiple hybridizers who go from pod to moist vermiculite in the fridge. I know hybridizers who have never refridgerated a seed, they just plant them. There are some who dry the seeds and then go to dry chill in the fridge.
If you are hybridizing, the method you choose may simply be to work with your planting schedule.
If you harvest and direct plant the seeds you would need to have time for them to establish before winter (in cold areas) or you would need a place to allow them to overwinter in a protected area. (like a greenhouse)
If you moist chill seeds, you need to be able to plant within 6 weeks of harvest. They should be sprouting and need planted.
If you dry chill your seeds you are not restricted to any particular calendar. You can plant the seeds whenever you want.
We have chosen dry chill since we make 10,000 seeds and want to be able to choose when and how we start them. We have started some of our seeds outside the spring after harvest. To do this, seeds need to be kept for 8-10 months before planting.
I doubt there has been any type of research to be able to determine what we have observed in seed handling.
