In my day job for ###,%%%, @@@@ I sometimes, have to ask one of our Audit Agencies to go over a company's contract bid, which includes certain aspects of their books, not all.
I am required to give them 90 days to complete said audit in my schedule of events.
So when you are talking multiple mergers / acquisitions taking place in a short period of time. I would say whoever the audit team is, is going to go over all of this, plus past filing years of all entities just to make sure everything smells kosher.
IMO 30 - 60 days is not enough time to complete such a task, especially when you look at the fact that this is happening over holidays, and in the summer time when most want to take advantage of the weather and have relaxing time outside with families or friends.
Just my opinion, take it for what you will folks