Could anyone please let me know how to get the response time for Asynchronous requests.
Response time for asynchronous requests, in what context?
Are you referring to concurrent groups or something else entirely?
An example of what you're after might help.
You're not paranoid if they really are out to get you.
More info would be useful.
Perhaps you're talking about the sort of setup where a request is sent (for instance, via webservice call or MQ put), and then at some point in the future a response comes back via some channel?
If this is the case then it depends on your system, what logs are available, what happens when the response is processed etc etc.
You may be able to look at logs and correlate message IDs to work out your timings.