There is a standardized format of writing Torah scrolls called Vavei Ha'amudim. The concept is that the majority of columns in the Torah (except for 6 places) should start with the letter vav.
This answer gives a bit more detail on why this format was done as well as its controversy. However, it seems that the concept is to create Sifrei Torah to match Davidovich's Tikkun format.
Considering that the main requirement to conform to the format is that the letter vav appears at the top of the column. Considering that almost every verb usage in the Torah has a vav hahipuch, it's not hard to do this.
Are all Vavei Ha'amudim Sifrei Torah that were created after Davidovich's latest standard identical? If not, how many current Sofrim (approximate percentage is fine) these days are using Davidovich's format as opposed to just creating any other Vavei Ha'amudim standard?