[nhaehnle]

No, inflation is measurably delayed and hurts the poor and middle class more than it does the wealthy because insiders have preferential access to credit, allowing them to benefit from inflation.

The same applies under demurrage. You're just shifting the loss of value form the real variables to the nominal variables.

I've read a lot of advocacy for demurrage, but somehow nobody is ever able to put a finger onto where the difference is supposed to be exactly.

Demurrage reduces interest, where interest can have negative/short-sighted effects.

Perhaps it reduces the nominal interest rate. Why should it reduce the real interest rate? (Unless you suppose that after introducing demurrage inflation stays the same; but then you might as well go ahead and increase inflation to achieve the same effect)