Six pack response...

As usual, I've come to the experts, always someone being able to help me with my stupid questions or needs.
Can someone tell me what is the "norm" of a response to a six pack smashed to the floor at around 2-2500 rpms ?
Is there a hesitation before the vacuum kicks in the end carbs or is it supposed to feel like the Dead Sea opened up and swallowed you....
Thanks in advance to any and all replies.
Here's a Nicks Garage video of a 340 6 pack on the dyno. You will be able to see the outboard carbs open under full throttle acceleration. (starting at about 9:45 but you might find some tuning tips before that)