My CRISC grandfathering application was selected for auditing. I was not very in top of it and I do not remember the timescales but I had the feeling that the process was quite efficient.
That was my case 5 years ago for a CRISC grandfathering application and in fact I do not have the complete details of the communications between ISACA and my references. I am not sure it there are different kinds of auditing and if currently is the same process.