The average was "48" which means the minimums were at unacceptable levels. You have to understand that every game behaves differently and that certain levels of performance in different games are acceptable or unacceptable based on the gameplay.
The one thing about game performance is that it is subjective. What I feel as "playable" isn't necessarily what you may feel as playable. This has always been the problem with that sort of subjective opinion.
What we do here is provide the data for you and show it. We put up repeatable and replicable data that you can compare with. You can run the built-in benchmark on your own system in the same settings we did and directly compare the results. We put up the graph, you see the numbers. It is therefore ultimately up to you to determine what you deem playable.
We do voice our opinions and experiences on what is playable, and they are just that, our opinions based on the experiences we have.
In this way you have the best of both worlds, you have empirical data, and you have our opinions based on experiences.