It can often be a week or more before more test work units are issued, if only a small number get issued then not all computers get work.
In the last lot only one of my compters got work even though all 4 run 24 hours.
It really depends on what the project people want to test and what problems they create or try to solve.
I have seen breaks of over two weeks with no work. I just use it as a stand by with a lower cpu share and do work when it is issued but I don\'t rely on it for work I do other projects as well.