I think it has more to do with how the life is lived, rather than the titles and statuses associated with it.
However, generally speaking, an average monk does live in a way which is more conducive to a successful meditation practice than your average layman... but what is average? I'm sure there's a fair bell-curve going on.
(P.S. Patiently waiting for someone to mention Joseph Goldstein
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"The uprooting of identity is seen by the noble ones as pleasurable; but this contradicts what the whole world sees." (Snp 3.12)
"To argue with a person who has renounced the use of reason is like administering medicine to the dead" - Thomas Paine