^Yes, but the dream Soong was presumably programmed into Data by the real, younger Soong when he built Data. I took it as basically a playback of a recorded message. Although now that I think about their relative ages, I think Soong would've been somewhere around 60 at the time he built Data, so I guess he must've programmed in a younger image of himself, no doubt out of the same vanity that led him to make his androids look like him (and, again, like his younger self).