No, I can't see anything that would indicate any primordia or as you call it, "pre-flowering". The first primordia usually occur some way down the main stem where there is a leaf/branch/main stem junction, and not at the growing top. Have a look at my diary "Holy Mackerel .. WTF?" to see some pictures of both male and female "pre flowers" or primordia as they are know scientifically. Hope this helps,.... Organoman.