I had some Fruity Thai that ripened early as well. Yet my Sensi Star and White Widow flowered on time. They were all started at the same time and were on the same feed schedule and light cycles. It was definitely a head scratcher, but I didn't mind. The only thing I did different with them was I put them on the perimeter of the lights in bud stage as they were taller than the rest of my girls. I don't know if this was a contributing factor or not. Less light = Earlier ripening??? Who knows?