This is a very interesting videohttp://www.youtube.com/watch?v=ySnFKxgPvaM
I still don't understand the benefits of undenatured or the differences in the process used to make them. The claims are quite fantastic though aren't they?
I found a method for testing the amount of undenatured protein in milk.http://wyndmoor.arserrc.gov/Page/1958/1272.pdf
Essentially you add some acid to the milk, put it in a beaker and spin in it a centrifuge to separate it out. The amount of whey protein nitrogen contained is an indicator of how much undenatured protein is contained in the sample with an R value of .97 which is a very strong correlation meaning it's a good test.
The above test was designed for powdered milk, not powdered whey protein but the test is measuring whey protein so I wonder if it would still work?
The problem with this test is that you would need a baseline to work off of and the only way to get a perfect baseline for the test would be to create your own whey protein from raw milk. I think it would be a better experiment if you used ordinal values to measure the dependent variable or in simple terms, it would be better to just compare a bunch of different protein powders and see how they rank against eachother.
I think the idea is that we are separating the "milk fat solids" from the "whey protein nitrogens" so we'd end up with two things in the test tube, what is undenatured and what is denatured.
Anyway I don't have a centrifuge. If someone did have access to one, this is a fairly simple experiment but you could really piss off some supplement manufacturers if you published it! They'd certainly rip you to shreds asking where you got your samples from and if they were authorized etc.