The special does what should have happened in the actual show: it drops the pretense of anything with meaning about the characters and story. Toradora! Special is filler for the original series, and therefore better than it. The animation is somewhat better too.
Don't get me wrong, this is still crap to view unless you enjoyed Toradora! in the first place. I didn't, so while better than the show, it still feels completely uninspired and generic. It was somewhat cute in a repetitive way, and got a nice and childish message (doing things for others makes it better!). Seriously though, it isn't worth it.
The irony is that because people who enjoyed the show want content, they will find Toradora! Special a let down, and people who didn't will see this as better but still rubbish. I don't know what they were thinking, but hey, I spent twenty minutes of my life watching this and it didn't make me regret my life choices. So it isn't all bad.