[nke-lnx-cms-p001]$ uptime 13:48:21 up 58 days, 5:15, 3 users, load average: 0.29, 0.35, 0.19
My post got lost in the devnet migration, so here it is again..
`TeamSite/bin/iwstat -mstarttime` will usually give you the timestamp of the last iwserver reset, assuming nobody is manually resetting the statistics in between.