Perhaps - I guess I took a while on XS1 trying to make it last longer...But I'm pretty sure it takes at least 50-60 hours to get through Xenogears. And I guess why I initially thought my stuff was under was because I've played them so much (e.g. FFVII) that that's what happens - I forget about the initial playthrough.
Although my first time through IX and X, I did beat them in ~33 hrs... I still don't know why FFV takes so much longer compared to the other SNES FFs... just job classes can't be the only explanation. Oh well. Best way's to find out!