I wouldn't think either is advantageous . Learning to fly at a little field vs a bigger field, there is margin for error in the bigger field and that may give more confidence to the student.
IT IS EASIER to pretend a BIG airport/runway is short than to hope that the small runway is big enough in a tight situation.
I learned and taught from a 2500' runway with obstacles on both ends and difficult winds.
It would be a lot faster to learn somewhere less challenging and then build up to the more difficult runways.