(Follow-up)

Strictly speaking, placing the verb "to be" (any form) in the middle, instead of the end, of this construction would be nonstandard. However, one case in which it may be more common is in a subordinate clause, especially where a subject may be confused with an object. Consider the following:

"Some believe that experiences are substantially more important than are traits."
"Some believe that experiences are substantially more important than traits (are)."
Both are correct, but the former is much less conversational.

A classical example:
"There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy."