DMcG,

I have not one clue what the Lambda-CDM concordance model is, but I will enjoy finding out. I am glad you found Chief Mountain interesting.

If I understand your question aright, I would say no, it would not falsify AEN if there were a finding which decreased the estimated age of the Universe by (for example) 10 billion years. Ten billion years is a major revision by any standard but, if the updated theory were still fully naturalistic, and still required billions of years, it would still be AEN, and thus AEN would not have been falsified.

Kent