Opinions on how much longer.

Forget about breeders time. They'll be done when their done. You can't plant a seed and then set the harvest date on a calendar based off of breeders times. Basically expect to potentially go several weeks or longer than what the breeder description says. Also, with many strains being hybrids "indica/sativa crosses" that are not stabilized but basically pollen chucks you could get a sativa leaning pheno that could take twice as long as what is stated.

Blue Dream Auto from Fastbuds is just like this. I've had them go 100 days and still probably harvested 7-10 days early. I've learned my lesson with sativa autos...........

Looks like you got at minimum 6 weeks. As far as breeder times, those are under breeder conditions, which are usually commercial type, highly controlled set ups.