Seems I was right...funny that.
I think the main problem getting an unbiased opinion of people who have it is that they've spent so much money on the system, so much time on detailing the airtightness, they won't be honest with themselves about how good it is.
As you say location and climate important factors, as is usage of the house. Home all day in winter and large family vs single person or couple household who work full time.