You will be able to use the Laptop with the integrated graphics. And I guess that is what was used for certification.
Regarding Optimus, you will encounter one of several possibilities:
- Discrete Graphics will consume battery power with no way to access them or switch them off (worst case)
- Discrete Graphics can be disabled with vga_switcheroo, and/or accessed for individual applications with the Optimus hack which Phoronix reported about some time ago.
- A BIOS switch exists which can enable/disable and re-route the display outputs to the discrete graphics (best case).