Maybe so.
The one difference is that these have been major news stories and people just go "meh." Maybe when we get closer to the general election, people will start saying, "wait--THIS guy could be president?"
I get that his favorables are high, but I just can't get over how unenthusiastic his speaking is. He's the least enthusiastic speaker in the entire field. He's also got 0 experience as either a CEO of a big business or a politician, which you would think would hurt him in the general (I specify, because that's part of the appeal for the republican base).