A:Answer Each manufacturer calls their TVs motion handling capability something different, and many don't even mention the term "refresh rate" or use "Hz" at all.
Vizio often uses Effective Refresh Rate and it doubles the native refresh rate (which is the true number you want for comparison). On this model it is referred to as "Clear Action" number, which is triple the ERR (and so 6x the native refresh rate or 720/6 for 120Hz).
So after translating all this, the Native (true) refresh rate of this TV is 120Hz. Phew! Great article on CNET about all the manufacturers measurements.