You are incorrect in your assumption. At JetBlue, there are three PAs to choose from after the brake is set after an RTO or Emergency Landing:
Remain Seated = do not evacuate.
Cabin Crew at Stations = evacuation possible, wait for command.
Easy Victor - Evacuate.
If it is decided that an evacuation is not warranted after the "cabin crew at stations" PA, then it will be followed by "remain seated."
At no point is there an actual "evacuate" PA given, just the coded PAs.