I have three flowering now, no flowers yet though. I saw jakespeeds posts about it and it is not a cross. They are pure sativas for sure, I have some ACE Green Haze x Panama next to them and the KG looks way more like an extreme sativa. I think Gypsy just took the guys word for the flower time when he acquired them and never grew them out.
Here is an old pic, they are about 5 feet tall now. I'll get some new pics posted