It doesnt have enough benchmarks to really show the state of the drivers. It doesnt show how it performs with wine. It doesnt show how it performs with Unigine engine. It doesnt show how it performs with any steam game.
All it shows is on the benchmarks run the linux Intel driver is sometimes slower than the windows Intel driver. But that isnt what the article title says. That is not what the conclusion says.
Once I did this, I really noticed a difference.