Interesting article, but I believe it contains an error. It says the "pollen parent must be streaked" if you wish to have streaked or variegated seedlings. I believe it should be the POD parent that needs to be streaked.
And yes, the vast majority of the seedlings will be green, but even from other non-streaked plants, you can occasionally get nice surprises. I have one variegated seedling that is a reverse colour variegation from the pod parent. And you can get other attributes such as frilly leaves and red petioles.
One other thing, if you plan your own crosses rather than letting the insects do it, be prepared to rise early to beat the insects to the flowers.
