Bigredmachine:

To answer your question about 20 second block times producing more orphans than 60 second blocks:

The main cause of orphans is when two miners find the solution at the same time.  Both miners then proceed to the next block, but one is now on a fork.  This happens even if the block time is 20 minutes.  The more numerous the blocks, the more numerous the orphans.  

If there was only one pool mining a coin, and all the miners were on that pool, there would not be any orphans at all.  But since there are several pools, and many solo miners, the chance of simultaneous solutions increases geometrically.

The reason for the short block times here, is to get more coins out there.  There is no limit to the number of JPC coins.
JPC has a 120 second block time