The watery part that comes off soya "milk" is not Whey, not technically. Also there is no commerial vegan "whey-like" product, so the point is mote. This subject is "raging" across several boards now (with a lot of the same people
All commerial whey protein isolates are made from milke, so advising someone to eat a whey protein powder is telling them to eat a non-vegan product.
Whether Mike (who seems a clever guy & ok everytime I've ever spoken to him) made a mistake about it, or is mis-informed I don't know.
On he Vegan Fitness list I've said I'd be happy to communicate with him as long as I got permission from the person who got the mail from him to use it (I don't like using quotes from personal stuff without permission). I dont' think it will be a problem unless we all go in gung-ho without finding out the exact details.
It's a shame Mike doesn't believe veganism can be as good, if not better than a meat diet (he ought to talk to Pat Reeves- European Powerlifting champion ) who's kept terminal cancer at bay for more than a decade using raw vegan diet & alternative therapies (the doctors gave her weeks when first diagnosed!). Or the a lot of the older guys that "cured" their bad joints by a change of diet to a vegan style of eating. But, if he believes that, then he should be honest about it. He thinks you can do better with meat, than without, it'll be up to us guys & gals to prove him wrong