Hi,
Another data point. Tomorrow I have a flight from CDG-SIN (beginning in AMS). Have a ticket in PE, an S sub class. Checked in today and was offered an upgrade for 419 Euros/60k miles to J. I am still thinking about it since my ticket is already rather expensive.
A sort of just over on what I was willing to pay or use miles (in the old system, this would have cost me just 40k miles).
Cheers!