So, whilst it is difficult to give a definite answer to the actual
number of Christians in the world (estimates range from 2 - 3 billion), http://wiki.answers.com/Q/How_many_Christians_are_there_worldwide#ixzz1u3y8XWvT
VS.
"There are very few pastor’s studies, seminary libraries, or even Christian homes that do not contain at least one volume of The Expositor’s Bible Commentary." Logos blog
=====
Why am I suspicious that one of the following applies:
- Christian homes is narrowly defined
- hyperbole was practiced to the extreme
- someone extrapolated from personal experience
- someone was testing the fallacy detective

... I almost missed it.