Were you able to tell it was a 2.5rs because of the scoop? did you also see it have 2.5RS wheels? The color, was it a darker silver/ dark grey? I know of 1 Impreza with a 2.5RS front end conversion w/ 2.5RS wheels that was custom painted a non factory Subaru color. this was a sedan?
If the discription matches the above it must be my buddy Ed. He is a bigger guy with a beard and a Impreza sedan with a custome dark grey paint job w/ 2.5RS front. Highly doubt theres any other dark grey sedan out there. I would not be concerned with anything, hes a very nice guy. Most likely he took a picture of the house for the color it was painted?