av-comparatives are trusted by many anti virus companies and experts worldwide to do "independent" testing of anti virus products.
The info on the links are from the august 2013 real world test.
These results often change monthly etc but it is easy to see a trend amongst top rated products if we check whenever the tests results are released.
The chart gives the overall real world results but for more info it may be advisable to read the full report.
http://chart.av-comparatives.org/chart1.php?chart=chart2&yea…
Full report: http://www.av-comparatives.org/wp-content/uploads/2013/09/av…
Check your product results in last months real world..
AVG didn't so well…