There are many factors that make evaluation of any block a difficult task, at best. All blocks will be affected by flow rate and power input from the CPU. Obtaining even two data points for different flow rates on a given CPU only begins to hint at the block's performance at all possible conditions. Trying to get accurate data at multiple flow/power combinations quickly adds up to a lot of work for a reviewer. On top of all this, everyone's systems are different and there is no easy way to predict how much flow you'll get from a given setup unless it precisely matches a review somewhere.
IMHO, I'd like to see four measurements made for a block. High vs low flow and high vs low power. Sounds simple enough, but even here folks would argue about the definition of "high" and "low".
Then there's the perspective of people that are interested in overall system performance as opposed to a piece-meal evaluation of components. A great block is no good if the radiator or fans are not up to the task. Sure, lots of people piece together systems on their own, but lots simply want a complete kit.
You'll never please everyone no matter how you review.
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