Scott, how can you know that ? You'd have to be on the aircraft and hear the RA to know for sure.
The reason I mentioned the delay in reporting an RA is the tragic Lake Constance example when there was a delay in the DHL RA report. I don't mean to lay any blame, just to show an example of the pilots' first priority to aviate and navigate before communicating an RA.
In an ideal world one pilot would fly the RA and the other announce it immediately. In the real world a delay of 5-20 seconds doesn't seem unreasonable.
Max Angle said
I can safely say that I would not follow any advice from anybody until the TCAS RA is over, you don't even do what your eyes tell you, the aircraft you see might not be one the generating the RA.
Is that what we might expect all pilots to do ? Are ATCO's training for this ? Is it worth giving any avoiding action during an RA incident ?