When using the Add to SFDC campaign flow step, that is near instantaneous. It can be delayed if you have a substantial campaign queue, but the actual execution of the step and the ...
Velocity will use the SOAP name, though it's easiest to kill two birds with one stone, and just drag the field from the editor into the script. This will give you the correct refer...
There's no equivalent to 'SELECT *', if you need all the fields then they need to all be listed. The easiest way is by using Describe Lead and then iterating through each of the fi...
I would either use list import if they all have individual values as Tim suggested, or a smart campaign with a change data value step if they all have the same value.