They sound very useful for a SFF case where I don't want memory blocking airflow to hotter components. And if they consume fewer watts themselves, all the better.

DDR3 RAM does not need any top mounted heatsinks even with the very high frequency 2400-2600 MHz. DIMMs as a DIMM only consumes ~10w-12w of power.

Since there is no significant system performance advantage to ram frequencies above 1600 MHz. for typical desktop PCs other than those with APUs, any 1600 MHz. DDR3 RAM should serve people well. While there is a small power saving with LV RAM, it's not worth paying extra for unless you electricity rates are quite high.

And yet again not testing high memory speed in the right scenario and configuration.
The AMD FM 2 platform would have shown exactly what this RAM delivers.
FM 2 + High Speed RAM = a specific number of FPS in Games = real world performance measurement

I doubt any Intel user cares about RAM with speed over 1600Mhz as it will gain nothing from such investment.

At least add FM 2 tests to your methodology.

The Intel platform BOTTLENECKS your RAM test.