I am reading up on op amp stabilty and the Ti app note "Stability analysis of Voltage feedback op amps" has a section discussing the pole created by the output impedance and the load capacitance..
I just can't get my head around their thevenin equivalent circuit "looking into the capacitor"
In case you forgot, you have to effectively disconnect the circuit from the left of Vout. After that, it is very simple to find the Thevenin generator and impedance.