of course they do! thats the reason why they banned them in the 1st place. the "local" touring cars just couldn't keep up.... i think its sad that they decided to ban a much faster and more advanced machine for being just that.
as for group A making a come back, i cant see that happening in this life time, as cool as it would be. i think the cost's would be too great for the teams, having to order most of their parts from japan. i do believe that the R32 GTR's were the most exspensive cars to run in the Aust. Touring car Championship to date. correct me if im wrong though....