It's all good. It seems that this topic gets brought up at least once every few weeks. Soy lecithin granules, especially at the moderate doses we use for PA, are not going to effect estrogen or testosterone. From an old post:
According to the USDA, soy lecithin contains an average of 15.7mg isoflavones per 100g.
http://www.ars.usda.gov/SP2UserFiles/Place/80400525/Data/isoflav/Isoflav_R2.pdf
and this is from examine.com
A lot of people, myself included, seem to find 3 tbsp of lecithin granules (1.8 g PA) to be a good amount. That's 22.5 grams of soy lecithin, which should only contain around 3.5mg isoflavone, much, much less than the 100mg number examine mentioned.
The article you linked has some flawed logic, so It's not even necessary to go back and fact-check it. Even if lecithin granules do have the same percent of phytosterols as soy milk (which I am not saying is the case, I'm just going with the assumption here), a glass of soymilk, as they stated, is 245g, where most people use about 22.5g (3 tbsp) lecithin granules as a source of PA. That's less than 1/10 of a cup, or less than 1 ounce of soymilk. That's absolutely trivial. It's similar fallacious logic, fear mongering even, as saying that apples contain arsenic. While it's technically true, you really have to take the doses needed to have effects and the amounts in said product into consideration for it to mean anything at all.