Does this talk about Thumb really belong in the Maemo Reloaded thread?

Anyway. All makefiles auto-generated by qmake on my N900 have -mthumb in CFLAGS. In my limited understanding of these things, I interpret that as at least Qt binaries built on the N900 are built as Thumb by default. Am I right? Not sure about binaries built by scratchbox, never managed to set up one successfully.