I have a 2005 GTI manual, I used to average around 28 mpg but after a stage 1 remap by Revo and a pre cat removal, I know can easily get 33 to 34 mpg round the town. On longer runs I can get upwards of 45mpg when before it was around 38.
I would definately consider a remap if I were you. Obviously if you boot it all the tme your mpg will be a bit lower, but all round driving while still having a bit of fun, you''ll be pleased with your new mpg. Not only that but a big smile cos of the cars new alive feel.