Yes, perhaps religious/not religious is a better (if tautological) dichotomy, with christians etc and atheistic religions like Jainism on one side and non-religious atheists and "I think there's probably something up there but don't care about it" agnostic theists on the other.
Atheists who specifically assert that all religious beliefs are false are, of course, doing so in the absence of evidence themselves
See my reply to firvulag below on the difference between having a strong opinion and faith. But given how ignorant most atheists (myself included) are about the full range of religious and spiritual beliefs out there I agree that probably the best we can say for certain is "I have yet to encounter any religions I think are plausible, and as far as I can tell anything which fits my definition of "religion" is likely false"
Re: Codicil B
Atheists who specifically assert that all religious beliefs are false are, of course, doing so in the absence of evidence themselves
See my reply to firvulag below on the difference between having a strong opinion and faith. But given how ignorant most atheists (myself included) are about the full range of religious and spiritual beliefs out there I agree that probably the best we can say for certain is "I have yet to encounter any religions I think are plausible, and as far as I can tell anything which fits my definition of "religion" is likely false"