Hiya
Yes, you are right...but I and many others are not privvy to such information about how a project website is running and at what speed all of it's functions are operating at. And no project admin is ever going to give out ANY information about how well their website is running.
The only ways I have of checking if a project is suitable for a Sprint is:
1) Contact the admins in advance and hope they reply - some do not
2) Keep an eye out for any advance warning of any maintenance that will be carried out
3) Check the project website to ensure that there are plenty of tasks available
4) Check that multiple users/teams are being awarded BOINC credits in the last 24/48/72 hours
5) Keep my fingers crossed that all will be well, light a candle, say a prayer, cross my fingers, find a four leaved clover, hope a black cat does not walk in front of me, and never, ever walk under a ladder. !!
regards
Tim