The blood effects configuration line is simply missing from all the predefined benchmark profiles. They were apparently never updated by CA to adjust for DLCs like the blood DLC. Since the line is missing, the benchmark will probably use what's configured in the user settings or maybe even enable it by default when it's not disabled explicitly. This will also influence graphics performance if people use different settings. The preferences.txt file from post #3 in this thread already contains gfx_blood_effects true; but AlQamar should actually change it to false, otherwise people without the blood DLC will report different performance. And the gfx_blood_effects false; has to be added to the CPU benchmark configuration file, otherwise performance for the same configuration will differ by 30%.
Btw, I am German too but I still have the blood DLC (wasn't much of a problem to get it).