Such a small number of test seeds it might not mean anything but an "eyeball" analysis (since all 7 germinated quite quickly in peroxide), suggests they all had seed dormancy straight from the pod.
I think we may have two potential factors involved: one might be - when does seed dormancy develop, the other might be, do daylily seeds need to have their moisture content drop below some level to be able to germinate when seed dormancy is not a factor. As well, placing them in water with or without peroxide might introduce other complicating factors.
If daylily seeds are left in the pod do they regularly sprout there? That would probably only have a chance of occurring in southern locations where seeds mature earlier in the year than in northern locations.
I expect that there are southern daylily growers who have at least a few seed pods mature early in the year, possibly in June. I suspect that the earlier in the year daylily seeds mature the less likely they are to be dormant. I think that would be a strategy that is likely to be evolutionarily successful and selectively advantageous. If certain daylily genotypes produce mature seeds in June but those are dormant until the next spring while other genotypes produce seeds in June but they are not dormant, then as long as those seedlings survive they will have an advantage over the seedlings that did not sprout until the next spring. They will outcompete them and probably out-reproduce them. An evolutionarily successful seed dormancy strategy would be to have seeds be dormant when they are produced too late in the growing season to successfully over-winter but to produce non-dormant seeds when they are produced early in the growing season with enough time to prepare for winter and successfully over-winter. That would suggest that the level of seed dormancy would be dependent on environmental factors the seed experienced while developing in the pod.
A more rigorous test of whether daylily seeds can sprout without a period of "maturation drying" would be to use seeds from pods that matured as early as possible in the growing season, say in June. Remove the seeds just before the pod matured. Plant half of the seeds immediately in soil as normal. Allow the other half of them to dry for a day or two and then plant them normally in soil. Compare how long each set of seeds needed to germinate.
