So if testing began right after this news release then
2000 by end of May 2019
3000 by end of June 2019
4000 by mid-August 2019
5000 by end of September 2019 (so around ECOC conference)
However, if testing began a month or two prior to that news release (which I think is highly likely) then the timetable can be moved up, and of course, any delays would move the timetable backward, so my thought is that worst case these two would be offsetting each other, and the simple math set out above be about right
So I would say even if not at 5000 hours by the ECOC, I'd bet they would be close enough to be using "the data" in Dr Lebby's presentation there