The answer is you will never know as it will covered by an NDA,...

The answer is you will never know as it will covered by an NDA,
Until a formal deal or offer is made.

One would expect that interested parties would have read through all the other already published results,
And asked whatever questions they wanted etc.

Some of these may well have been how they want to see the results of the tests,
As in how they would like to see the results presented,
And what markers they would like to see, etc.
Which could well be what the sort of thing mentioned while engaging with each other.