That's a interesting question. If I understood correctly, Bradley's farm is meant to be offered for Thea, TWL and KT users, but uses Thea (honestly, it's hard to see how KT could properly be used in any larger farm). So it must convert KT xml from KT and TWL to Thea...
You are correct sir
Actually I began my experience with rendering using TL. Then KT was suggested to me. Subsequently I migrated to thea (which is what gave me the idea to build the renderfarm.). I actually still use TL in each model I build, since it's integration w/ sketchup (although slow to render) works well when I'm creating materials and testing them (instead of opening/closing thea over and over again). I just keep TL open and test with it when I'm experimenting with mats.
Also - (specifically about the renderfarm) - yes, I am attempting to write scripts to "parse/update" XML exported by TL (and native KT) and efficiently render them in Thea.
Actually, these models were first constructed awhile back (specifically these that were asked about) and were rendered first in TL). Now that I have Thea, I'm going back and re-applying mats to them w/ thea and re-rendering.
**EDIT: for clarity - this was a test on the xml parser that I'm making, to apply material settings and generate thea XML (correct formattting) from a given TL/KT XML...