Breast milk does NOT taste like cows milk.
From first hand experience I can tell you that it is sweeter and richer(fattier tasting) then cows milk.
Also what the woman eats a few hours before the milk is drunk can have a BIG difference in it's taste.
I tried it a few times when my son was breast feeding both cold and warm(fresh from the tap).
It was really sweet after she had been eating ice cream.
And if she ate onions or garlic the flavor would come through in the milk.

One interesting question I always had is that if breast milk boosts a babies immune system, could it also do the same for an adult?