If you simply stick to detection and dont mention other features, it will not really give the viewer a fair review.
Lets say for example that the detection rate on a pack of 250 files dated within 10 days, avast only score 86%, while on 10 links from malc0de, it detected 8 out of 15.
Based on the above figures, you would probably rate the most 3 stars.
Now any user that will read that will only understand why you rated as 3 stars based on the figures, but then there are other good features about avast that you dont even touch. just because detection rate might not be very good, considering other features, it can balance it out.
Normal users look for the product as a whole: ram consumption, cpu usage, UI friendly, detection and prevention, additional features.
What you showed on your review was more the bones, than the meat itself...