Untrue. YE Creationists used to routinely debate with evolutionist professors on university campuses, in fact they had one several years ago at the university where I got my graduate degree. This went on until the evolutionists realised that the creationists were thrashing them. Then, the evolutionists suddenly decided that they didn't want to debate creationists because "we don't want to give them any credibility".
So why did the creationists transform themselves into IDers if they were winning the battles?