This has happened to me 2 times now.
Both times have been leaving my jobsite around 5pm.
I have started the engine on my 4cyl Camry. I usually let it idle long enough (10 sec) to put on my stereo faceplate,
Released the parking brake.
and shift it into gear.
I am pretty sure that the delay was more than 3 seconds before the car started to move.
No clunking sounds, no noise from the rear drum brakes (no sign what so ever that paring brake is jammed)
Car was bought used at 76000 kms (47500 mi),
Dealer serviced and has had fluid change before purchase.
I am very puzzled.