Because the test did not look very well set up, we chose not to participate in it. Others have already commented on the merits of the test arrangements, so I won’t go into more details in here.
However, curiosity got the best of me and I downloaded the test set and tried it on F-Secure Linux Server Security 5.52. Of the 34 files in the test set, we detect 31 as infected. The remaining 3 files are password-protected zip files, which obviously cannot be scanned.
So, we did rather well in the test after all. But you don’t have to take my word for it. For good testing of anti-virus software see Virus Bulletin and AV-Comparatives where our software has always gotten top scores.