I believe you're right, the water needs to stay in the concrete so there is a proper cure time, dehydrating too quick might not be the best for the chemical reaction. 

--------------------------------- 

insluation under the concrete will help eliminate almost all frost under the floor and will then prevent the frost from coming up and sweating in the spring -- well drained sand or rock, as mentioned above will also eliminate frost and sweating.

condensation on the concrete is rare in the fall.  concrete will rarely 'sweat' without frost underneath. 

Think drinking glass with ice water.  Cold surface + warm air = condensation.

Of course, days when the humidity is 100% are a different story.  Then the 'sweat' is from the air dumping water on the floor, and temperature differentials don't have to be much at all to see some really wet surfaces.