I'm willing to bet your gonna start seeing some signs very soon, I took a look at mine today and there is some evidence starting to happen out of the 4 I have, two are the same strain Bubba Kushberry, I have signs on two so far, one Bubba and one unknown bag seed.
Bubba looks like it has very tiny ball sacks that are starting to form and hang on one of the nodes, but I am not 100% but it is starting to look 60% chance a male on this one I am going to give it another day or so to make sure but I'm pretty sure I will be yanking that one. On the unknown strain I saw what looks like a white hair starting to stick out, so like the bubba I am pretty sure this is gonna be female but I'll give HER another day or so to make a final verdict...
Give them a few more days and I found these signs on only on or two nodes in the upper region of the plant... Good luck and hope this helps you, I'll let you know when the other two start showing
I am having issues with the camera that would be able to show you what I am talking about so pics might not be available before you need them.