Is there  a way to fix the call answer delay?
From what I can tell, this issue has been resolved with Gingerbread 2.3.5. I no longer have the issue with my device running Gingerbread 2.3.5 (actually i think CM7 is based on 2.3.7 now). From what I am seeing in the reported issue is other people are saying the same thing about it being fixed. I am not sure if your device has an update available or not though.