I forgot I had this shot, taken where I was looking down a little on the tufted Jaguar.
Notice there's no separation on the upper surfaces at all from nose to tail, except for a tiny amount at the base of the rear windscreen.
Measured pressures:
Once you get a feel for it, it's one area in car aero where, if there's attached flow, you can be pretty confident where there will be low and high pressures - and also make a good guess at their relative values (on the upper surfaces, anyway).
Incidentally, look at how low the pressures are above and below the car, compared to the wake pressure.