You are really old now lol! My previous experience with timing belts are every 60K-80K depending on make or 5 years, whichever came first. I personally like timing belts better because..
A) on some cars you can actually pop the cover off and "check" them
B) less valvetrain noise
C) usually less of a pain in the ass to change
D) usually cheaper parts
E) no need to deal with crap tensioners or guides
I think because our motors have the belt sump lubricated, it should in theory last up to the 150K mark