Dang, this was surprising.
I sent in a 16-card submission to PSA earlier this month under their Value (45-business day turnaround) service. So it showed an April 15 estimated completion date.
So, I was quite surprised to get an email today that my submission was completed and already being sent back to me.

Less than a month total time.
As for the grades...a few lower than expected, a couple higher than expected...most right about where I thought they'd be.