Newer Springfields have the new melonite coating which seems to be holding up fine. I can't pull up one case with an XDm/XDs with rusting issues. Granted that the XDs is practically new, some people torture their guns.
I should have clarified, joe average will never notice the difference, under normal use. Melonite is "good enough" that most buyers won't care. It's still a marginal finish in my book, but it's not so bad that it would stop me from buying an XD or any other handgun that uses it.
-Mike