Have so far sat through two Latin exams (one 2 hours, one 3 hours) and have yet to sit my Greek exam (three hours, taking it well into "No Fixed Abode, Cricklewood") and my exam for Introduction to Greece and Rome, a further three hours. I handed in my Greek and Latin assessments in January - 40% for each of those subjects, I believe, which I thankfully already know I've passed. On the upside, I never have to do a Latin language exam again. The downside is I have to do more literature....
[rab] Your experiences are uncannily matching those of one of my officemates ... (first reserve after fellowship interview, [I'm assuming that's what your thing was?] ended up with a job in Germany). Good luck with whatever happens.