This thread is like a time warp for me. I swear there was a virtually identical thread in the NW or DL forum when I lived in Singapore and the general consensus there was probably to avoid use of a 'Murican carrier if you want to avail yourself to TWOV because those carriers either don't know that it even exists as an option or don't understand that it can be used on a roundtrip ticket where the arrival and embarkation countries are different, regardless of whether there is a "stopover" as defined by IATA or merely a connection. I recall that thread had a ton of (mostly American) people who had never used TWOV opining on how it should be interpreted, plus ca change...