I purchased WW and Thai from Nirvana back in January '09. I received my order, in the time frame they stated, and was informed the entire way on there progress. The stealth was very good! Took me a couple mins. to figure out where they were.
As for there genetics I only have the WW going now. Out of 10 seeds 8 of them germinated in a day for me and went into soil. The 9th seed germinated on the second day and the tenth finally germinated on the 5th day.
Two days after going into soil the first 8 were above ground. The ninth seed poped a day after it hit the soil. I only have room for 9 plants and usually plan for mature nature to claim one in this time. But the tenth seed did pop up but it was almost a week later. I figured it was't going to pop and shut everything down. It just died from lack of light, but it did come up!
Out of the nine I got 3 males and 6 females
Out of the nine 2 ( 1 male and 1 female ) showed more of the indica pheno. Plants were/ are almost 1 foot + shorter than the others. The rest of them are within 2 inches max of one another. The 5 females are almost identical to one another. Big thumb sized flowers just pouring out the trich's.
Now this is my first grow with nirvana but over all I would have to say there WW is in the 60-70% stability of genetics WITH a high M to F ratio. I never found out the sex of 10 but would guess it to be a late female as the 9th one ended up being my indica female. So if that be true that's a 30/70 M/F!!! I log this info for breeding purposes is how I can provide the details.
Only a month and a half and I'll get the Thai going and reap the rewards of what looks to be a nice harvest of WW
Hope this helps with some of the contriver say over Nirvana. I am very satisfied!