Priest talent · row 1 of Discipline, from level 10 (5 with Talented 5/5) · Physical

Wand Specialization

Increases your damage with Wands by 13/25%.

Game files · build 1.60.1.70245Read from the WoW Forever beta client, build 1.60.1.70245.

Compared with Classic

Classic tooltip

Increases your damage with Wands by 5%.

Data	Classic	Forever
effect 1 value	5	25

What Blizzard said about Wand Specialization, each line checked against the files.

Matches the files
Wand Specialization: Now only requires two talent points for the same benefit.
The files Classic needs 5 ranks for 25% wand damage; 70245 gives 13/25% over 2 ranks (spell 14524).
Wand Specialization Class deep dives: Priest and Warrior

69876 Sep 16First beta build we archived. No changes in the client files since.