Yes I agree. But it's hard to know too much in arranged marriages. During the "courtship" you are at your best behavior usually.
valid point... but ppl should be open and honest at that stage as well... and if they're not religious or if it's really important to them, then they should communicate that as well as their expectations of their partner to the other party. it's an important topic (it's just as important as discussing career ambitions, kids, etc...) and should be discussed openly and honestly... otherwise there will be problems for both parties later on.