Here's someone from last year who reported the same thing - and his follow-up conversation with the retailer:
Could you take a picture of where Faroudja is advertised on the box, and upload that picture to www.imageshack.us and post the URL here?
Also, who sold the unit?
I just bought a Samsung UN55C6500VFXZA with DCDi Faroudja. How do I know that my TV has this additional technology? It states it on the box, but Faroudja is not mentioned anywhere else in the user guide? TIA