No, it was not. Artillery's employment was as a supporting arm not as a supported arm during the Seven Years' War. Battalion guns supported the battalions they were attached to. In order to employ artillery effectively as an offensive weapon you have to have an effective command and control system and that means artillery senior officers being able to control the aritllery on the ground. That didn't happen during the Seven Years' War. The main belligerents during the French Revolutionary and Napoleonic Wars came to understand this. THe French were the first to have an effective artillery command and control system in the field. The Russians and Prussians didn't have one until 1813-1815, though I would submit it was still inferior to that of the French for various reasons.