Pitts, while I am no EC advocate, I will suggest to you that it is in EC's interests to get to the bottom of this because they face a non trivial customer confidence problem. Their investigation, which will doubtless aid and abet the AIBB's efforts, has to be thorough and right or they don't solve their problem. As I see it, not solving their problem hurts them in the millions of dollars in revenue, or maybe tens of millions.
They are incentivized to get it right, and to show AIBB and the various regulating agencies how right they really are.