Depending on your numbers, yes. If you are a crappy applicant, it will not mean squat, while if your numbers are good/great, then yes, it will look that much better. (I was given an oral acceptance at my brothers school while he attended, along the lines of "well let you know soon regarding your acceptance here, but let me just say in advance that I think that your brother and you will be very happy here, wink wink") I didn't end up going there, but it was nice of them.