Doug Suttles tweets at 0830 on 18 July:
Data continues to show encouraging signs and we’re reviewing w/ gov’t team. We will continue to leave the well shut in.
Pressure is currently 6778 PSI, what we would have forecast in a scenario where the resevoir would have been depleted.
We are continuing to run extensive tests and monitor. We’re going to take this day by day.
There doesn’t seem to be any information that would justify a resumption of flow via the collection and production systems. Yesterday’s official statement from Admiral Allen (below) is therefore a bit puzzling.
When this test is eventually stopped, we will immediately return to containment, using the new, tighter sealing cap with both the Helix Producer and the Q4000. Additional collection capacity of up to 80,000 barrels per day is also being added in the coming days.
Why resume flow?
Bud's Offshore Energy (BOE) 
Why isn’t this the expected outcome if pressure depleted because of flow into another formation doe to casing faiure??
This is possible, which I am sure is a concern. However, pressure continues to slowly increase contrary to what you would expect if there was flow into a formation. The slow build-up could imply a less robust well after several months of unmanaged flow that presumably initiates in the annulus.