Here's the question. It was closed simply because I tagged it as "14.04" (I am using Xubuntu 14.04 which is not released yet). However, the question is not specific to 14.04 in any way, it is specific to Thunar 1.6.3 which has been released for almost a year. The moderator that closed my question made no effort what so ever to assist in answering the actual question, or to give any insight on where the values that confuse me might come from. Instead, I got this:
You are using 14.04 right? right? right? right? right?
As soon as I confirmed this was the case (and asked why the tag was removed), the question was closed as off-topic.
This annoys me a little bit. I understand that AskUbuntu cannot allow questions that may be software defects in an unsupported and unreleased version, but in this case I was merely posing a question out of interest for where the sizing numbers are coming from, and if there's a functionality in Thunar (or any other file manager for that matter) for displaying recursive file size.
Not sure if I'm creating even more unnecessary drama by posting this here, hopefully not, I just wanted to get a second opinion.