Based on my observations and experience both in "live" worlds and the beta...if a Sim is on moderate and you make a push at a recruit that gets you to moderate, it will do a burst the next cycle in an effort to "defend" its recruit. However, if you knock Simmy down to low or very low, it will make no further effort on that recruit and start looking for a new target.
I'm also fairly confident that if you get to moderate first and the sim doesn't get above very low that it will not take further action on the recruit and will instead start scanning for new targets, at least during session 1.