My husband and I were on Mediterranean diet our whole life because we are coming form that region. We did however use a lot of milk products since we just love all kinds of cheese and we use milk in coffee which we drink in abundance. For me amount of milk would definitely come to a cup a day and much less for my husband since he drinks it with almost zero milk.
I personally don't' know what to think about milk per se. I think it is important to drink organic and pasture fed since added hormones and growth factors definitely do not help anybody that has cancer of any kind. We are now using soy milk for green smoothies, minuscule amount of organic cow milk in coffee, avoid cheese, and make oatmeal with tiny amount of goat milk and mostly water. We did not eliminate milk 100% since even studies said that up to 2/3 of a cup a day seems to be fine.
We also reduced simple sugars and included bunch of supplements while we are waiting for RP in August.
All in all, his PSA went down since January by more tan 2 points (from 7.6 to 5.1 ) and I truly believe that diet and supplements do have an effect.