If memory serves me correct a Dalat Vietnamese was vegged for my usual 4 weeks and then put in at 12/12 for like 4 months or so before it showed flowers. It took something like a total of 7-8 months from start to finish. Your mileage may vary. I have read that equatorial sativas grown in such places as the Yucatan and Colombia can take up to 14 months from germ to harvest. Phytochrome just doesn't seem to drive these types unlike today's mutts. Definately not auto flowerers which have Rudy in them.
When a breeder lists flowering time, he's fudging and telling his target group what they want to hear. Everyone wants it right now, so they up the time, plus how plant grows and when it finishes is mainly driven by the grower's culture mainly temps (genetics aside).
UB