I think that we should raise or SET the bar for air tightness goals.

What is the bar? Is there an Energy Star standard? A LEED standard?

Should it be the Building America Westford Metric?
What is the Westford metric? is it 1.5 Air changes per Hour at 50p or is it 3 ACH @ 50?

How about Passivhaus Standards? 0.6 ACH50

How many out there are surpassing the Westford Metric?

Is any one besides Passive House USA meeting Passive house airtightness standards?

What is your best blower door result and how did you achieve your air barrier?