Lets start off with its NOT the hook system or even Joe's Mod It's MY SERVER!
This is what i did Disabled the hook system and much to my surprise My first byte times almost doubled and yes on many test runs! Ok then dawned on me I use VB optimize. Ran a series of test with VB optimize disabled and my server lack of resources reared it's ugly head once again! With VB optimize disabled it no longer mattered if joe's mod was enabled or not first byte times suck!
Re enable optimize and same results as before that convinced me that it was Joe's mod and it wasn't, My server just had to run through a little more php and first byte time increased.
Thank you for questioning my results made me look deeper into the issue.
Boy I bet mod developer's hate guy's
like me that don't look before they leap and give wrong info!