Well, I can report that the PowerFlarm core fails to warn me of commercial traffic most of the time. In the past week, I have been within distances of concern to a Boeing 737 and a Canadair Regional jet - they descend over our gliderport into Tucson International. My transponder seems to work, though - both these aircraft took evasive action to avoid me. The Canadair was at my altitude and had to make a very steep turn away from me. Not a peep from the Flarm!

Mike