Worldcoin just hit difficulty 0.25 now, and it's getting coins every 1-5 seconds at current hashrate. That's pretty good, considering the minimum scan time in cgminer is 1 second, that means if you have cgminer getwork every second you have a good chance of having almost no stales. You also have very low load on the network. Still a lot of orphans but a lot less than 99.9% orphan rate I was getting for the first few hours.

I was seeing more than 5 blocks per second on worldcoin when I checked. I don't know what the peak was but that's pretty crazy.

EDIT: 5 blocks per second at first I mean.