The version of Avira tested wasn't the free one, although I think it uses the same engine & definitions. BitDefender for Linux is free for personal use so how would you classify that?
I think you know exactly how I'd classify that.
Free versions of software subsidised by paid versions do not count as anything special because they more than likely have a greater number of people using the free version than the paid version and therefore don't have much money available to develop heuristics etc. etc.
There's only one exception to the above. Microsoft, and I think you know why they are the exception.
