I would be very surprised if the majority had no belief in God
(however defined) at all.  I would not be surprised that people were
less firm about, for example, what life after death actually entailed.

It is interesting that the mainstream Anglican tradition (to which I
belong) has long had a kind of approach which says that "here is what
the church holds to be true" but then generally lets lay practitioners
a fair degree of freedom in their actual private beliefs : a typically
English compromise between the Protestant view that religion is a
matter of personal conscience and the Catholic view about the central
importance of tradition.

There is a lot to be said for traditions and observances - especially
when people know what it is they are doing and why and as part of an
historical spiritual community.  But even when they don't they can
sometimes be useful anyway.  For example, their are many atheists who
self-consciously style themselves as cultural jews and follow many of
the traditions of that faith like observing the Sabbath and Pesach so
on because they see value in those traditions.

C