My opinion - was a disappointing turnout even considering the train issues to Falmer. Not ridiculous at all - my opinion
I think some are forgetting that there are always loads of STHers who don't go. Hasn't been an issue for a long while as the ticket exchange has been open regularly.
On top of that it's a school night. Particularly relevant if you live a long distance away.
Plus the train strike and expected chaos.
Nothing suprising or disappointing about the turnout imo.