Yea i do not think that link is accurate at all. There is no way to tell the genetics of a seed. The bottom line is half of all seeds are male, half are female. That means that you have a 50% chance of a single seed being female. If you have 7 seeds then its most likely you will have 3 or 4 females. Count on only 2 or 3 females because you dont want to get your hopes up. Dont NOT use a seed just because that stupid link says its a male. Its wrong, use as many seeds as you can to increase your chances of getting as many females as possible.

-JPG