Generally, no. North India predominantly uses the Nirayana system with Lahiri Ayanamsa. However, for historical consistency, researchers use it across India.
: By 1980, the gap between Vakya predictions and actual astronomical sightings (Drik-Ganita) had become noticeable. This is because the Vakya system does not frequently account for the precession of the equinoxes Eclipse Discrepancies
offers a downloadable PDF collection of Vakya Panchangams covering the years 1972–1981 Internet Archive: