i think that its so interesting that when people try to set people up that the focus is on specific ritual observances without mentioning the mindset behind them. someone can dress the part but not believe in what they are doing. on paper someone else may not seem to be so ritually observant, but have incredible kavanah about what he does do. this is why all of the labels in the world on frumster wont ever begin to tell me the religious level of a potential date. frumster does give everyone a chance to state what their level of judaism is, but the personality section would tell me more about their religious level.
if someone is so rigid that they always have to have the last word then most likely they are just as rigid in their religious beliefs no matter how ritualistically staunch or lax. if someone is a live and let live type then they probably feel this way toward religion. if someone is the keeping up with the jones' type this will manifest in their religious beliefs. they will want a fancy kiddush because everyone else does, will follow the hippest chumrahs.
of course its important to know the nuts and bolts of a potential's religious level, but it only means something if one considers their personality = mindset.