Mine are looking pretty close to the same on Day 19 after planting. Just potted up to the 5 gallon cloth pots. I'll put a post up tomorrow with pics. Started feeding them Fox Farm nutrients. Got my White Widow seeds for free from Seedsman. Photoperiod seeds.
Mine aren't growing as tall. More bushy it seems, but same fat leaf phenotype, especially compared to my Purple Ghost Candy. Perhaps the auto compared to the photo seeds. You are even keeping your lights closer than mine (though I see you had yours at 30". Maybe I should lower my lights too). Looks good!
I'm thinking about topping this next week.
@MinnesotaMarijuana, I've grown these before and they were bushier. Could be this one just wants to stretch. But autos do grow faster. I think it was just 10 weeks from seed to harvest last time.