Does the switch control the receptacle, or is the receptacle always powered?
I read through several manufacturers sites, but they don't say! I am
guessing it is always powered, giving the option of breaking the tab and
wiring to the backside of the switch; but the obvious answer is not always
the right one.

They have 2 brass screws on one side, and a brass and nickel on the other.
I presume the brass and nickel go to the light to be controlled by the
switch?