soy vs whey protein powder

Last year, I followed Loren Cordain's Paleo Diet for about six months.  In the spirit of removing dairy from the diet and avoiding soy, I started supplementing with egg protein powder.

Many nutritional sites state things similar to this about egg protein powder:

"Egg protein is made from the egg white and is therefore fat-free and high in protein. It is considered the most perfect source of protein because it is complete in essential amino acids, branch chain amino acids and glutamic acid. It is completely and easily absorbed by the body. Because of its characteristics, egg protein is used as the standard against which all other proteins are measured. Egg protein should not be used by anyone who has an egg allergy.

Benefits of egg protein:

• Highest in the amino acids alanine, arginine, glycine and methine
• Fat-free"

Speaking from experience, whey protein powders usually caused some level of gastric discomfort even though a visit to the allergist proved that I am not lactose intolerant.

Soy protein is a different story.  Loren Cordain's research and this article:

http://www.electroherbalism.com/Naturopathy/Therapies/Diet/Soy/NewestResearchonwhyYouShouldAvoidSoy.htm

turned me off soy for good.