If I remember the TAR9 situation correctly, the teams that took the bus lost 15 minutes in doing this, hence why they only received a 15 minute penalty.
Michael/Kevin and Mark/Bill both screwed up in the middle of the leg so I don't think WRP could figure out how much time was 'gained'.
WRP Dan/Andrew, wasn't part of the issue that they also forgot their cow thing from the Detour? Since the clue specified that they had to bring something from either Detour, forgetting it would be the same as not checking in with all required items (passports, the chicken of TAR 12, the charm of TAR 10) and in all of those instances they were asked to get their stuff and come back.
(Regarding Terence/Sarah possibly surviving...it's probably better for the season that they hadn't. In order to get to Almaty they connected through Moscow, which I suspect would constitute the single 'use' of their visa in their passports. If they survived, then T/S would've probably been stuck in Almaty, which gives us a final three right at the start of leg 9. Then it becomes a matter of if they run the legs in Russia, in what capacity they're going to run the legs in Russia, how they're going to deal with Toni/Dallas and the passport issue, etc. We might have had a final two for the first time.)