An article in The West Australian - which talks about the newest season of Loser, mentions Tiff briefly. It says she trained one winner of the show, tied with Michelle Bridges for 3rd place on The Biggest Loser tally board. Pretty impressive considering she was the newest trainer and the fact that she only appeared on two seasons. The text reads:
"The hardest thing with this bunch is they all know each other," said the show's most successful trainer, having mentored four winners, including the winning family in season six to Bridges' one, Willis' two and former trainer Tiffiny Hall's one (she had the biggest individual loser in families season six).