Since Pinnacle is trying to mislead people on this:
I sent the withdrawal request on the evening of 15 January. I received no confirmation e-mail until >100 hours later.
Finally, they sent the withdrawal confirmation e-mail at 4:23 AM CST with a 30-minute expiration time. I was not awake to receive the e-mail, so the withdrawal expired at 4:53 AM CST and I had to start the process over again when I woke up.
The time from the initial withdrawal request to receipt of funds was approximately 155 hours.