I think that might be wishful thinking NewMe! Cooking wine burns off some the alcohol content, but I don't think it affects the sugar levels - diabetics are advised to avoid alcohol even in cooked meals. Boiling and resting a meal cooked with alcohol will reduce the alcohol levels by around 85% but no cooking method completely "burns off" all the alcohol content (contrary to popular belief!), therefore there is still significant sugar content. As the process is evaporation it would seem logical that alcohol can evaporate but not sugar.
Even if something is slow cooked with alcohol over a number of hours there will still be a residue of about 30 - 40% alcohol. So the long and the short of all that is yes, alcohol should be counted a syn in whatever form.