No, it's PPLNS.
On the web site: Help->Payouts https://kano.is/index.php?k=payout

Some of the stats show how much of the 'current' block you've worked on.
That's not what is used to determine rewards.

To determine a single particular reward, you need to see your % of the total hash rate sent to the pool for that reward.
That's shown on the Account->Rewards page after the reward has been calculated.

Easiest using an example of my rewards for the last block:

That particular reward 5Nd range was from "20/Nov 19:15" UTC, then back "176hr 16m 42s"
The pool hash rate average over that time was "2.23PHs"

So if you mined for that whole time with accepted shares at 500THs, you'd get 0.5/2.23 of "25.12289053" or ~5.63BTC in that one reward
The "Your N Avg" actually shows what your average hash rate was for that entire time.
So if you've only been mining for half of that reward, i.e. about 88hrs of it, then your overage over that time will actually be ~250THs, so you'd get ~2.82BTC

Now of course, as usual, you need to remember that all shares submitted, can get rewarded, 0, 1, 2, 3, 4, 5 or more times.
If pool luck is always 100% then each share should be rewarded ~5 times.
Each time a share is rewarded, it will usually be ~1/5 of it's PPS value.

If this one goes to 200% again I'm sure everyone (including me) will be sad