Does a persons IQ play a big part in their ability to talk on a cellphone, while driving?

First, i am not a big advocate of people driving and talking on a cellphone, at the same time. i pull off to the side of the road, when i receive a call that needs to be answered. many people have a difficult time just to keep their vehicle on the road and a cellphone just complicates the safety situation. Question: do you believe a persons IQ plays a big part in their ability to drive a vehicle and talk on a cellphone, at the same time?