Sorry Bret, the 8 second rule is not a standard or anything and if you do a search here you will find many discussions about this. 8 seconds is arbitrary, a good response time is dependant on your network and systems. You need to find what your average respone time is on your current system and decide if that is good for your needs. If it is not, then you need to start looking for bottlenecks, and problem areas, until you are satisfied with the response.
Sorry couldn't be more help.
Simple minds, Simple thoughts!
I figure if you have the courage to get out of bed in the morning, then how bad can the day be.