It's probably less noticeable. Our torque converters are pretty loose on the bottom end and it will make it more pronounced.
Try this. Next time you're on the highway and you let off the gas (when you think it has slipped out of OD), pull the shifter back into "3". If the RPMs go up, you were still in OD. If the RPMs don't change, then it is in fact slipping out of OD.