This may be a bit late to be of use, but habits vary and specifications with them. In countries where temperatures are not as low indoors as in the UK you will find that people do not demand near freezing fridges so your temperature range would be at the high end of what they accept. Food hygiene has traditionally been a weak point in the UK and it may be because of this that people are now being urged by authorities and the media to adopt higher (if not very high) standards. Running a fridge with 2-5 degrees as a target is of course more expensive than nearer 10 degrees. Also, persuading you to condemn/scrap a fridge which does not go down below 5 degrees is also a very attractive proposition for another group of people.