It is.
Luntz declared Hillary the winner at 7 PM east coast time, based on the exit polls. Surely you heard this from all the media people. The exit polls said she won the necessary states. It was the exit polls that caused the long delay calling Georgia and Arizona. They said she won those states.
That . . . is pretty powerful evidence. They were wrong.
The exit polls as they relate to the victor can be wrong given the huge numbers voting early or by mail. The other data seem to correlate to the actual result. Do you think blacks voted overwhelmingly for Hillary? Latinos? Do you think whites voted overwhelmingly for Trump? What data contained in the exit polls are wrong?