Nope, my Vizio P-55 C1 shows the res and fps that it is receiving.
Dan
When using an HDMI input it is showing whatever the device you are using is set to. Maybe the Vizio is capable of ignoring that and reporting the actual resolution.
As an example if you set a DISH receiver to 1080I that is what a TV will show as the output even while watching an SD 480I channel. If the device has a native resolution output the TV then should reflect the the resolution. (As a Genie can be set to)
Another example using an OTA TIVO. The TIVO itself will display whatever resolution it is receiving. But the TV it is hooked to will show whatever resolution I have the TIVO set to. I keep it set to 1080I so that is what the TV always reports, but what is actually being transmitted may be in 720 or 480I.