Good to see that he does have some class. Can't say that of many other supporters of Clinton, who have been acting in a very disappointing way. Threatening electors to vote against Trump, these useless recounts where Trump still won bigly and whatnot. So this is very refreshing of Tim to say.
It's not a matter of class. As CEO, he represents Apple and his responsibility to the company should outweigh any personal feelings / views he has.