It strikes me as sort of a cross between a pie crust and a blitz puff pastry.
Kenji Lopez-Alt more or less disproved the idea that you can't get a flaky piecrust if you work the butter into small pieces, but his method requires some discipline. (Most good ideas do.)
The real key with piecrust is not to overwork it once the water has been added, that'll lead to a tough and definitely NOT flaky piecrust.
Whole wheat pastry flour is the only pastry flour I can find locally.