Visual Studio C++ Return Value Optimization is the Best (RVO)

Intel Core i7-3770 @ 3.40Ghz
Windows 7 Professional 64-bit
Visual Studio 2010 Version 10.0.40219.1 SP1Rel

#include <iostream>

struct C {
  C() {}
  C(const C&) { std::cout << "A copy was made.\n"; }
};

C f() {
  return C();
}

int main() {
  std::cout << "Hello World!\n";
  C obj = f();
  system("PAUSE");
  return 0;
}

Depending upon the compiler, and that compiler's settings, the resulting program may display any of the following outputs:
Hello World!
A copy was made.
A copy was made.

Hello World!
A copy was made.

Hello World!

The console output is:
Hello World!