After about a 30-minute cool-down, I noticed the following:

1) the lower radiator hose is cool to the touch, but the upper-radiator, thermostat by-pass, and block-to-thermostat housing hose were HOT to the touch.

2) the lower portion of the radiator is cool to the touch, but the upper half of the radiator is HOT.

Are these the symptoms of a failed waterpump (110K miles, original) (hence no pressure) or a clogged radiator ?

I highly doubt the radiator at 3-years old is clogged . . .

I put a stethoscope on the water-pump at idle, but I don't know what I should hear ?

TIA,
:-) neil