Same, and also +10/-5 from vref.
I would have thought that delaying a warning call until the PF is five knots below VREF is leaving things a bit late. It only takes a couple more seconds of speed decay below the already minus five knots to be in real trouble. While VREF is a safe speed depending on local conditions, five knots below VREF in a 737 just prior to the flare will invariably result in an uncomfortably firm touch down unless you have it under control with more thrust than usual.
The minus five knots below a selected approach speed is wearable but to be minus five knots below VREF before a wake up call is made by the PNF is stretching the friendship a little too much in my view.