An article out today on MSNBC posses that question. It cites a few memos by democratic strategist Jennifer Crider and Texas republican Pete Sessions. Crider's memo is very optimistic that recent polls are saying the democrats have halved the republican lead and Pete Session's memo has an outlook of republican's only picking up enough seats to stop the democrats "functional majority".
First off the article is from MSNBC. They're like FOX news only the flip-side, highly partisan, only arguably more so. MSNBC desperately wants the democrats to remain in power and articles like these are meant to get the party faithful, who tend to watch and follow them, a little more jazzed and willing to go to the polls in a few weeks. My attitude is that articles like these are frivolous and nothing more.
Also interestingly enough, the article makes a brief attack at John Beohner, who recently went on the campaign trail to gin up votes and money for various candidates. Yet the author, Charles Babington, refers to it as the "speaker-in-waiting" tour and claims that others have called it that, although this claim is completely unsubstantiated. I call shenanigans. Comments like that are meant to create a narrative that over time can become the perceived "fact". That Beohner is licking his chops and chomping at the bit to get the speaker position. Fortunately I think that this article will go fairly unnoticed since it's pretty much counter to what every other pundit is saying about these elections.
My guess though is that you'll see a lot more aggressive BS writing coming form the democrats and their sympathizers as time presses on and even more so if the republicans do end up taking back control of the house.