I can't recall, either. Sometimes the details in a lot of these cases start running together.
Maybe if this is a small town, the local LE knew they needed help and called in TBI very quickly.
Kyron's family and Somer's family had LE liasons move into their homes with them for quite some time. Haleigh's family was scattered to the winds and her father wouldn't return to the house but he camped outside near search headquarters. Caylee's mother ... well, they moved Casey in to live with LE.
I'm trying to think ... who else ...
ETA:
I think I misunderstood your question.
Trying again -
Kyron's family had immediate FBI response b/c abduction happened AT A SCHOOL!
Haleigh's family had Florida State Investigators responding within 24 hours, I think.
Somer's family even sooner than that, IIRC.
You know, what's interesting about Holly's case is - she's older. When children disappear, and it's apparently not a family-related abduction -- the immediate response is called for sooner than when older teens or adults disappear.
So...we should really answer the question about Holly's case relative to others based on her age.
And so, I have not been helpful here at all...I fear... But I'll go out on a limb and say that for Holly's age, IMO, that was lightening quick response.