Early polls move around a lot. Debates can make a big difference, especially in a primary. Witness a new CNN/ORC poll that shows Carly Fiorina leaping into second place after her strong performance in last week's debate.

In four CNN/ORC polls since shortly before the first debate in early August, there's been a staggering amount of movement. Before August 6, the field was ranked Donald Trump, Jeb Bush, Scott Walker, 1-2-3. Now? Trump, Fiorina, Ben Carson. Walker received too little support in the new poll to even round up to 1 percent. Stunning.

The surges from Fiorina and Marco Rubio are obvious there. She saw a bit of a jump after her performance in the first debate, but that was the mini-debate, the kiddie table affair. Once she got into the major leagues -- and cleaned up -- her numbers really spiked.

It's hard not to notice the big dips from Trump and Carson, too. The margin of error here is pretty healthy, but it seems clear that a lot of support transferred from the top two to the two with the best debate performances.

Fiorina's jump happened across the board. She saw improvement with women, as you might expect -- but also men. She saw big gains with self-identified Tea Party supporters, following the pattern this cycle of constituencies offering their support along the same lines as voters on the whole.

Since July, there have been big shifts in the net favorability of Republican candidates -- those who view them favorably minus those who don't. Trump's seen a slight increase in how people view him; Bush and Walker have seen big declines. Carson's seen a huge increase -- and Fiorina wasn't even worth asking about back then. (But it wouldn't likely have mattered. Few voters would probably have had an opinion of her.)

Notice that Rubio's favorability has been and remains high. That's a very good sign for the senator from Florida, who may be poised to step into the role of establishment favorite. He's popular, and unlike the rest of the top four candidates, has actually held elected office.

But who knows. After the next debate, everything could change. After all, early polls don't mean much, right?