No, I think they're just taking advantage of the fact that the American media has been spineless as hell.
When Trump says something like that, the headlines typically read something like Trump: "Bigly Huge, Great Success" with any indication that that was complete BS buried somewhere in the text, because god forbid they actually do any real journalism and say something confrontational. Sure, any person with two brain cells to bang together can read between the lines, but unfortunately people just aren't that skeptical when it comes to their news. The first thing they hear is assumed to be true, so as long as people lead with alt-facts horse crap, by default the message is conveyed.
Thankfully this is finally turning around and people are starting to catch on. I just checked CNN, and two of the running headlines are "With no evidence, Trump says 3-5M illegal ballots cost him popular vote" and "Spicer: We can disagree with the facts." So we'll see where we go from there.