According to the ATW article -- not me -- they use T/R's in their landing performance data. It's posted on page five of this thread. I thought the same thing and then I read the article.

As I have never flown the -700 and only typed in the the other, I don't know why they would not have been able to. If it's like the Boeing I currently fly then they will not deploy unless the throttle is in the idle position prior to deployment. So if they're not "sitting" against the stops we can jerk on them all day and they're not coming out. Well, they're not supposed to anyway.