Another way to look at this...
We are not automatically intelligent or brighter thinkers because we woke up and left the Jehovah's Witnesses behind.
Leaving a cult behind does not automatically make one intelligent. I've seen some people act illogical after leaving the cult of the Watchtower--and I don't mean by joining another religion (they became atheists). Intelligence is not necessarily measured by what religious or non-religious views a person might subscribe to. If you were an idiot as a Jehovah's Witness, leaving the group won't guarantee any raise in IQ.
If we are talking about common sense and smarts, people shouldn't listen to any of us when it comes to religion if we freely joined a cult and later left. I mean, we may have the left the cult, but we joined it, to begin with. I wouldn't recommend people who chose cults as experts on religion to anyone--myself included.
Flipping the argument back to the way it was originally written--there isn't IQ involved. Religion is mostly emotional. A lot of people don't want to believe that. Some who leave cults want to believe that leaving a cult made them intelligent or is proof that they are more intelligent somehow than others that are left in the cult. That's not true.
Like those in cults, you won't convince people who now believe that intelligence is the earmark of Watchtower exiting. But the phenomenon of "waking up" is multi-faceted and is not limited to logic or intelligence.