Microstrip Copper Pour and Losses

Rick Hartley recommends tying the copper pours to the alternate polarity of the underlying reference plane, to increase interplane capacitance because such layers are often very closely spaced. Your talk refers to ground pours, though. How would having a power pour on the top layer affect the coplanar waveguide of a microstrip referencing a ground plane? Would the fields "prefer" coupling to the ground plane because the pour powers would require the return current to pass through a bypass cap?

EXCELLENT information, thank you!

I like 3D pictures and video simulations examples than blackboard drawings

what happens when you have a 20Hz to 20KHz signal with 20Vpp how would it be affected if the width is 0.5mm. The signal is not Digital but Audio