Wes of Sharka Corp and R1ckCa1n in the USA have teamed up to have the G 1/4 XT Double Impact reviewed by nikhsub1 of the
[H]ardforum and
Xtreme Systems forums.
However, it isn't being tested along with normal AC pumps. It is being tested with nikhsub1's test bed that he has tested a whole bunch of current water blocks for comparison purposes. They are using an Iwaki RD-30 pump at 18 volts.
First reports are that it is extremely restrictive, but we knew that by just looking at it.

It also appears to blow away the competition. ;D