It all really depends on how this thing works tho. I mean denying god i am sure has been said to be unforgivable (im assuming this is while u are living, once ur dead and come face to face ud have to have some gall to keep telling him he didnt exist), hence us atheists are screwed. If not, then id hope that anyone judging my life would say overall ive probably been a half decent guy.
I dunno if more of us would get in though, possibly as there are fewer extremists that are atheists, and so i spose we're less likely to do anything truly horrific in the name of god.
Now in terms of the topic a true christian is surely one that at the point of becoming christian (taking up the religion and all its beliefs) never knowingly sins again (not a single act that could be deemed bad, lies, slander, swearing etc etc), otherwise ur all just subrate christians that are trying hard.
Unseul
Give a man a fire and he's warm for a day. Set a man on fire and he's warm for the rest of his life....