What do you think about 1-1 point? Is it a good corner stone?

Here in Russia we have some strong players, who like to occupy star-points - as many star points as possible. Andrey Gomenyuk, 6-dan, for example - he always starts with sanrensei and takes star extensions+ tengen later.
But I never saw the idea of taking all four 1-1 points.
I remember that Andrey Cheburakhov, 5-dan (Moscow) once started at 1-1 against weaker opponent - he even mentioned that Black was able to get some benefit from his 1-1 stone later. But even Andrey will not think about taking all four 1-1 points as Black did in this game.
What do you think about Black's level? Is he real 6-dan?