I have noticed a difference! I don't know if the accuracy is less or not, but the aim points have definitely changed. Bombs now fall way too short in my opinion. It is as if the drag is only applied in the forward direction. In reality, which this is not, drag would also apply in the vertical direction, increasing the time of flight and allowing the bomb to make greater forward progress before hitting the ground.
But, of course, I'm comparing the old bomb model to the new one. Who's to say the old model was right? I suspect once you learn the new aim points with this model, you will be back to the JABO accuracy you enjoyed in earlier versions.