Got in line around 5:45am this morning (Saturday) for TSA Pre, took ~60 minutes to get through. It was orderly, to the extent these long lines can be. Several American-uniformed (I think) agents in the lobby helping answer questions, such as the most common question (which was my question too) about how to find the end of the correct security line. Very professional and thumbs up to those folks working what can't be an easy job right now. They helped to smooth the process and address some of the confusion in the lobby.

Numerous people playing dumb to try and cut into the TSA Pre line, fellow passengers not falling for it, directed each of them to the back of the line (nobody was rude about anything, but nobody was getting played this morning either)

Touchless was open, but the split of the TSA pre-line to 'regular Pre-check' and 'Touchless Pre-check' occurs after you've waited through the winding line in the lobby. So everyone with Pre-check (Touchless or not) is in basically the same boat at T8.

It did not look like anyone was able to enter the TSA Pre-check line from the business/first premium check-in, or at least I did not see it occur. I only checked briefly though, so I can't speak with certainty.

Listening to the employees working the lobby, it sounded like the lines can vary widely by day and time, all dependent on staffing levels at given time which is an unpredictable right now. Therefore, the wait times are also unpredictable.

The general line snaked back and forth throughout the entire lobby. I have no idea how long that took, though they (logically) had more general lanes than Pre-check lanes so hopefully the general wait times were not excessively worse.