The Deku Tree told you about the Triforce, exactly the same as the original. I wouldn't stake my life on it unless I can verify it, however, so I am NOT 100% positive. I wrote a FAQ on the changes however, with lots of help and input, and no one, including myself, noticed this change you are speaking of.
And yes, as I said, they changed the dialogue to reflect the new controls. This happens many times. They also changed the button colors to reflect the new button colors.
A new line added (which only occurs in Master Quest) is - "You have found 1 rupee. You are not very lucky!" or something close to that.