Intersting, still ~25% larger compared to 12F675.
The 12F1840 has a larger instructionset than the old 675 so one would think there would be "better" ways to do things on the 1840 (though PBP most likely uses the same library for both devices) - which then raises the question: Why so much larger?

Care to post the actual code so we can take a look and perhaps learn something?

/Henrik.