I sowed some Byblis liniflora seed earlier this year and the seed germinated in 4-6 days. I would think this would be normal for plants that grow as annuals. If they don't sprout, grow and flower quickly, they'd be completely wiped out.
It's great to hear your harvests are going well. The seed you sent out last time has produced marvelous little plants that some are even putting up tiny scapes of their own. You really have to love the genetic variation one can only get from seed.