Talk Radio ... and Concussions?

I have a long history of research into talk radio. Hell, it got me tenure in the 1990s, I published so much while the topic was hot stuff and I was arguably the leader in the field. So I keep up with what's happening in research. I stumbled across this study today on, of all things, recovery from concussions. Here's the key part for me:

While many activities were associated with longer average recovery times, only reading (p=0.024) and listening to audio books, talk radio, or podcasts (0=0.0003) were statistically significant. 

Wow. Talk radio, still evil.

Of course it's more about audio, something about listening, that leads to longer recovery times. I wish we knew what kind of talk radio -- Car Talk? NPR stuff? Rush Limbaugh? Okay, the latter might lead not only to a slower recovery but suicide, but you get my point. And clearly the audio books, talk radio, and podcasts are a combined category. In other words, we can't really blame talk radio. Not completely.