Doing a prop like this is no easy task, and being impatient and watching the clock will get you nowhere; Especially when it takes 2 hours to generate a few seconds; 

The time delay is intentional, and was applied in the iClone6 World Scale Panel for Physics to slow the flow.  A larger than usual Dampening was also applied to keep the flow steady.

Most of the descriptive data is in this preview.  

Once the Rigid Body Physics is generated, you only need to save the individual pieces as a set and turn off any further generation by disabling the physics.  This saves some time, after you get what you want in the way of animation.

Project Size for Storage 1,111,175 gb