Just one curious question....
We know that there is a 4-hour penalty for quitting a roadblock, and it applies immediately, is it the same for the detour as well? (which explains why the poker goddess were eliminated at the field and not on the mat if the answer is yes)
PS: Singapore is way to small for a double leg.
It's only happened twice, the detour penalty thing, but I think the situation depends on the task on hand. Like in TAR6, the teams had to bail due to final transportation leaving at the top of the hour. Hayden/Aaron took a gamble and left, hoping that Adam/Rebecca would be unsuccessful. With that, H/A would narrowly beat A/R, the 4-hr penalties would offset, and by default, H/A would have been in the F3. Instead, A/R were successful & caught the final ride to the pitstop. H/A were assessed the 4 hr penalty and then were eliminated immediately, right after Phil informed them of the penalty, and even before he checked in A/R.
I guess due to transportation or the lack of it, it's now the norm to wait until the next team arrives, and then start the penalty at the site. That way, if a team was like 8 hours behind, a 4-hr penalty at the pitstop would be irrelevant. Rob needed a plan in his TAR7 season, by making two other teams quit (which helped them too, since two other teams were behind Ray/Deana & Meredith/Gretchen).
With Maria & Tiffany, it didn't really matter, as everyone else checked in, and Phil would arrive to hear their inability to continue.