7.1.0 will be released tomorrow assuming all goes well in continued testing of the staging build. If your server is experiencing crippling lag, I would encourage you to try out the staging build in the meantime, as thus far there is only minor issues with it and it fixes the crippling lag.
7.1.0 has to disable the stat collection system as it is causing the lag. This is a temporary fix, which will make some stats display incorrectly (such as the species populations shown when joining a server). Some laws which rely on knowing action counts (such as limiting actions to a certain # per day) will also temporarily be non functional.
Estimate would be around noon PST for official release.