The ID (internal delay) setting has three control bits:
1. Override hardware default setting: enabled by default. (What!?)
2. Disable 2ns delay feature: disabled by default. (Ok, though the negative phrasing makes this confusing.)
3. Bypass 2ns delay feature: enabled by default. (Errr....)
So by default it is not-disabled, so the delay function is on. But bypassed. And the hardware defaults are irrelevant; to use them, your software has to explicitly disable the software override.