Perl doesn't have a standard CORBA binding yet, to my regret. Notice that Python already has one. Therefore, the API of each CORBA binding on CPAN is specific to a particular CORBA implementation:

• CORBA::MICO for MICO
• CORBA::ORBit for ORBit
• COPE, a pure Perl implementation of CORBA seems to disappear

I tried CORBA::ORBit a couple of months ago, and comparing the interface with the existing specifications for various language mappings, I can say that it's already close to them. (But why is nobody work on a Perl language mapping specification??)
The ORBit itself has a relatively good performance. See this for comparison to other implementations.

I don't know why Perl community seems to lack of interest on CORBA. Perhaps because many CORBA implementations uses multithreading for concurrency.