Interesting is that
https://utc.pool.pm/ has much less orphans than leet, but almost nobody seems to care...
Just 3 orphans in the last 24 hours.
But most miners seems to concentrate on nitro and leet.
Only 2 orphans in the last 100 blocks and 97.30% efficiency rating. This pool has not been down in at least 3 weeks ( I think a lot longer than that, but I wasn't tracking it ). I have been mining this pool since day one and I don't think it has gone down 3 times since it started.
Cheers and Happy St. Patrick's Day.