C++ 11 Move Semantics

I'm trying to understand how C++ 11 move semantics works. I have implemented a class which wraps a pointer to a String object but neither the move constructor nor the move assignment operator are being called as expected.

I'm using GCC 4.7.2 through Eclipse CDT:

Could you help me understand the reason?

#include <iostream>
#include <string>
#include <utility>

using namespace std;

class StringPointerWrapper {
public:

    // Default constructor with default value
    StringPointerWrapper(const std::string& s = "Empty"): ps(new std::string(s)) {
        std::cout << "Default constructor: " << *ps << std::endl;
    }

    //Copy constructor
    StringPointerWrapper(const StringPointerWrapper& other): ps(new std::string(*other.ps)) {
        std::cout << "Copy constructor: " << *other.ps << std::endl;
    }

    //Copy assignment operator
    StringPointerWrapper& operator=(StringPointerWrapper other) {
        std::cout << "Assignment operator (ref): " << *other.ps << std::endl;
        swap(ps, other.ps);
        return *this;
    }


    //Alternate copy assignment operator
    /*StringPointerWrapper& operator=(StringPointerWrapper& other) {
        std::cout << "Assignment operator (val)" << std::endl;
        //We need to do the copy by ourself
        StringPointerWrapper temp(other);
        swap(ps, temp.ps);
        return *this;
    }*/

    //Move constructor
    StringPointerWrapper(StringPointerWrapper&& other) noexcept : ps(nullptr) {
        std::cout << "Move constructor: " << *other.ps << std::endl;
        ps = other.ps;
        other.ps = nullptr;
    }

    //Move assignment operator
    StringPointerWrapper& operator= (StringPointerWrapper&& other) noexcept {
        std::cout << "Move assignment operator: " << *other.ps << std::endl;
        if(this != &other) {
            delete ps;
            ps = other.ps;
            other.ps = nullptr;
        }
        return *this;
    }


    //Destructor
    ~StringPointerWrapper() {
        std::cout << "Destroying: " << *this << std::endl;
        delete ps;
    }
private:
        friend std::ostream& operator<<(std::ostream& os, StringPointerWrapper& spw) {
            os << *spw.ps;
            return os;
        }
        std::string *ps;
};


int main(int argc, char *argv[]) {

    StringPointerWrapper spw1("This is a string");
    StringPointerWrapper spw2;
    StringPointerWrapper spw3("This is another string");
    StringPointerWrapper spw4 = {"This is a const string"};
    StringPointerWrapper spw5(StringPointerWrapper("String for move constructor"));
    std::cout << "spw2 before: " << spw2 << std::endl;
    spw2 = spw3;
    std::cout << "spw2 after: " << spw2 << std::endl;
    StringPointerWrapper spw6 = StringPointerWrapper("String for move assignment");
    std::cout << spw1 << std::endl;
    std::cout << spw2 << std::endl;
    std::cout << spw3 << std::endl;
    std::cout << spw4 << std::endl;
    std::cout << spw5 << std::endl;
    std::cout << spw6 << std::endl;
}