I'm sure serrated blades can tear up cardboard, but I've found that flat, thin-edged blades do it better for me. A box cutter, sure, but they are boring, disposable, provide no pride of ownership, don't actually hold an edge that well, and are so thin that any kind of torque will break a blade. Of course, that's why they are so cheap-throw in a new blade and forget it. I just don't like breaking things.
My ZDP Dragonfly surprised me when, right after I got it, I discovered how awesome it is at cardboard. My edge had to get reprofiled after I got it, and it is now one of the best out there. Any FFG blade, especially with a thinner, perhaps slightly convex edge geometry instead of an abrupt angle, will slice cardboard very efficiently. My Sage and Tenacious both do it very well. My Delica did till I lost it, but it was reground to convex-ish from an original saber hollow grind. The Sabre grind is not as efficient, and the hollow grind is worse. Both will cut, of course, but they don't slide through the cut as smoothly.
Can't wait for the Jazzz Wharnie Delica!