The malware samples from may were better detected by all the vendors when compared with April.
G-Data with the BitDefender + Avast engine on the very top.. all I can say is Congratulations!...but whenever I've tested G-data on my system it always had a high impact on the system/
F-Secure proves that it has some solid signatures,while Norton is the suite that performed "the best" if we take into account all the previous tests.
As for Avira Premium and the 3,1% Compromised.......all I can say is : That's a suite that can't face all the 0 day malware.