For the record, even with Auto's they sometimes need 5-8 weeks before showing sex, it totally depends on the genetics that are used. We have some 12-15 week autoflower strains that sometimes just start showing sex in week 7 or 8.
About the vegging, couldn't agree more with your buddy, especially if you grow limited number of plants.
With 8 weeks of VEG you ensure big and healthy plants with a strong root system, you can then look forward to big buds and a massive yield!
Good luck
@switch with the Hot Kitchen Kush mate haha!