Nehalem and Sandy Bridge CPUs
The GPUs inside Core iX-YYY and Core iX-2YYY aren't OpenCL capable, so mining operations are actually performed by the CPU, not the integrated GPU.
Ivy Bridge CPUs
The GPUs inside Core iX-3YYY are OpenCL capable, but even the fastest of them (Core i7-3xx7U) have 16 execution units and a core clock of up to 1300 MHz.
In comparison, an AMD Radeon HD 7950 has 1792 stream processors1 and a core clock of 850 MHz. Therefore, the AMD card will mine
(1792 * 850) / (16 * 1300) = 73.23 times faster than the Intel GPU.
Since the former mines at roughly 450 MH/s, the latter will mine at roughly 6.14 MH/s. That's magnitudes better than the results your getting, but not worth the trouble.
1 For bitcoin mining, a stream processor is comparable to an execution unit.