NPOV page says:
If we are to represent the dispute fairly, we should present competing views in proportion to their representation among experts on the subject, or among the concerned parties.
Shane (mis)understands this as:
a) We only give Einstein more space in the main article because his view is more popular, not because it's more credible; and
Not "more popular" -- "in proportion to their representation among experts on the subject, or among the concerned parties" -- credibility is an inherent part of this judgment.
--Jimbo