Uh huh. See:

"What unique predictions does many-worlds make?"

• http://www.hedweb.com/manworld.htm#unique

"Could we detect other Everett-worlds?"

• http://www.hedweb.com/manworld.htm#detect

"Many worlds is often referred to as a theory, rather than just an interpretation, by those who propose that many worlds can make testable predictions (such as David Deutsch) or is falsifiable (such as Everett)"

• http://en.wikipedia.org/wiki/Many-worlds_interpretation