If this test is truthfull I believe it shows us a accurate picture of how advanced Malware has gotten recently it can also show how important it is to have a layered defense (SAS, MBAM, Spyware terminator ect.) instead of just a resident AV scanner.
Damien,
I think these are statistics that are only as good and/or reliable as the source they come from.
They also appear to be slanted toward AVG which leads me to believe that they
may not be totally unbiased. Just my opionion.