Can I parallelize the sync (on commit) of a locally partitioned Oracle Text index?

I have a locally partitioned table with an associated locally partitioned context index.  In testing i can see that the actual commit synchronization does one partition at a time.  And, with 24 partitions, this takes a lot of time.

Is there any way to parallelize this to do 4 or 6 at a time like on the original context index build?  Or, should I just create each partition with differing sync (every nnn) settings?

Any advice would be appreciated.