Not so selective that he'd lose a state like California, where many demographic groups are well represented, by thirty points (seven points worse than Romney) and yet do significantly better than Romney in all of the right places. The fact that he's "different" doesn't mean that the results will be that convenient for him.
The
"he's different" line is a Trump supporter favorite. It gives them an excuse to ignore the fact that the vast majority of polls show him losing, sometimes by large margins.
Of course, when the polls begin to look favorable for Trump, they will become valid again
