I checked a few of the pools on the page (MPH, f2pool, 2miners) for their stales policy. MPH and 2miners don't say anything about it one way or another. F2pool indicates they don't pay stale shares.
On 2miners you can also get a rejected shares (stale). The difference is that 2miners always pay 100% for level1 stale shares. The ethereum blockchain reward stale work, so pools have a different definition of what a stale share is. On the 2miners pool you can get 100% accepted shares with --xintensity 512 and 0 stale shares, on crazypool you get ~5% stales.