Not that drivers ever hold phones while driving. And their situational awareness is always excellent.
I tried once, took a call whilst drivng when I 1st had a mobile & instantly realised how dangerous it was. never tried since, either get my passenger to take the call or pull up to use the phone. (and on one occasion got a warning for being parked on the road with my headlights on dipped from a trffic cop (2am)) 
That hits the nail on the head... Some people are more/less risk aware and some are more/less adapted to doing more than one thing at a time. Most people get better at things with practice, but whatever you do, you should do so with an understanding of the implications and potential consequences.
Is talking on the phone really more or less of a distraction than talking to a passenger?
Using a hand held phone is obviously a much greater hazard, but most newer cars allow you to dial by voice and a single button push on the steering wheel... As in fact will most phones. Same goes for navigation devices.
The only progress of sorts is that screens are now touch screen and nearer the driver's normal field of vision which makes them much more tempting.
In 1990 I was blessed with a fitted company car phone. Simple calls were fine, but often I would be having to discuss complex business issues with the directors, and other senior managers. Generally it was not safe as I was distracted from the main task in hand; driving my car. In the end I used to park up the car to take, and make, the more serious calls in the interests of safety.
Talking on a mobile phone, in a car or as a pedestrian, is always a distraction as the human brain, as much as you try not to, becomes totally absorbed in the phone discussion at the cost of really what is happening around the car or pedestrian.
The times I have had near misses with other vehicle drivers and pedestrians using phones, and I cannot see how the new Highway Code rules will change the situation with the latter now the stupid ones think they have complete rights over everything else!
