Humans generally place more value upon the lives of their fellow humans than they place upon those of other animals, yes.
So, you could say that in a human-dominated world, the general consensus (among humans) is that yes, humans are the most valuable.
However, if you're going by absolute, objective value, then I suppose humans are of equal value to other animals, being animals, themselves.
Hell, if the value of an animal is determined by it's contributions or non- to the ecosystem surrounding them, one could say that some humans are either of completely neutral value (due to non-participation in the ecosystem), or of negative value (due to the negative side-effects of human development, such as pollution).