I would go even further. Only create the abstraction when you have no other choice. If copying the code isn't causing you pain don't touch it, it's working code. In the rare case you need to update more than one copy you can grep a little bit for a while.

Taking a bunch of duplicated but "flat" code and creating an abstraction around it gets easier the more copies of the code you have because you have a more complete picture of what the right abstraction actually is.

Code is like clay, once it DRYs it stops being malleable.