75% now, so it would seem they have :-)
Based on a 300km day today, and Norseman being a mere 200km away, it looks as if they may intend to go straight through, missing its many attractions, and end up at the lovely Fraser Range Station, which offers ... even less. That would be another 300km day, but Norseman is a trifling 200km. (EDIT: And for clarity, there is an awful lot of nothing much between the two places, and for the next 1,200km.)
This site is a good advert for just how appealing cycling across the Nullarbor Plain can be:
https://www.nullarborcycling.org/ .
EDIT2: Given Amy's 'two shorter days coming' comment on Strava, it'll be Norseman tomorrow.