Unless you specified that 96 seconds ago the job queue was X, 10 minute sampling will confuse even more. After changing a tempalte used on hundreds of pages, i'll go to see how much work i added to the job queue, if the data is older than 30-60 seconds i may need to go there, i'll have the dangerous think "it wasn't so much load".
That brings up another issue - how do people interpret the number? Perhaps it would be better to give an estimate of how long the queue will take to process (I think it's processed at one job per request, so jobs divided by request rate should do it). While it wouldn't be any more accurate, it would be more useful. (And I expect the length of time on most wikis most of the time will be a matter of a few seconds tops).