I think it's common on PC threads for detached--or theoretical--interest to be confused with personal investment. This can set up a paradigm within which to dismiss views one doesn't agree with as posters or Ts responding out of "their issues." I think it's a kind of defense aimed at controlling the impact of feedback more than an accurate assessment of anyone's intentions.

When a T says that he "wants to think about X" before responding, I think the most neutral response of taking the words at face value until proven otherwise can be a less complicated reaction.