Well if you scratch the white iPhone it's like scratching a Macbook Pro... it's basically the same color throughout... "Scuffgate" is an issue because the black comes off to reveal silver.
funny, i don't remember complaining about "scuffgate" with my original iphone. instead, i loved that its case could take a beating instead of shattering like the 4/4s...
but if your asking if metal can still be scratched or scuffed, then yes