Maybe it's just me, but this looks like it would just reduce the surface area in contact with the water. Turbulent or otherwise, the more surface area contact you have copper to water, the better your thermal transfer.
Also, this would only succeed in creating more restriction for the water to escape the cups at the bottom. Maybe even reducing the impingement effect and turbulence.
That's my first take on it anyway... How about it Cathar? Ben2k? Jaydee? anyone? :shrug:

:shrug: