Different carburetors boil (or percolate) the fuel at different rates.
My experience as follows of "modern" carbs:
WORST - Carter AFB (I have two on my 390 CID HP)
NEXT -Rochester Q-Jet
NEXT - Holley 4150 / 4160, etc.
BEST - Carter TQ (thermoquad)
I do not have sufficient experience with the Autolites to comment, I try to stay within my field of expertise.
One other thing to consider: gasoline (fuel) composition is very different in various areas. Missouri's fuel is not the country's worst (that distintion belongs to Colorado), but Missouri fuel is pretty bad.
One other thing to consider: look at the compostion of the Carter AFB. The fuel valves are ABOVE the fuel level, there is no way for the fuel to syphon (unless the car is parked on its top) !
The AFB has NO passage for the fuel to leak, but it disappears! Magic ?
I think the Holley is the best of the non thermoquads because there is a layer of air beneath the bowl.
Jon
__________________
"Good carburetion is fuelish hot air". 
"The most expensive carburetor is the wrong one given to you by your neighbor".
If you truly believe that "one size fits all" try walking a mile in your spouse's shoes!
Owner of The Carburetor Shop, LLC (of Missouri).
Current caretaker of the remains of Stromberg Caburetor, and custodian of the existing Carter and Kingston carburetor drawings.
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