>Know what bugs me about this argument, though?  >Hypothetical availability
ain't the same thing as regular >consumption.  It hasn't been shown to my
satisfation that our >ancestors regularly consumed dairy in any form.

depends how far you want to go back, since the Auroch was domesticated about
8,000 years ago. adapting to it means to simply keep producing lactase into
adulthood, which 80% of caucasians do. so in terms of using it for food it
was a relatively simple genetic adaption. they would not have any concept if
there were increased cancer risk [if indeed there is] from the growth
factors.

andrew