No, there is no luck in pure PPS. In fact if you look at the site of abcpool.co, there isn't even a round history.
You only get paid for the shares you submit, hence your risk is 0 as you earn the same amount every day.
Your earnings are not based on any blocks being found or not because all earnings come from a private wallet.
Since the site has had a 0% fee for months, it is also the best possible way to mine bitcoins.
Mining at non-0% pure PPS pools is therefore done either out of idiocy, lack of logical capability or for ideological reasons
(supporting a certain pool owner, supporting proportional models, etc.)
P.S. I do realize pool hopping prop. pools and taking advantage of gullible newbies is the most profitable option, but that's not a 'pool model'
that's just taking money from those with limited information on how mining works.
Adding to this slightly. Sometimes pool operators add a promotion to attract miners. Thus, sometimes you can mine more profitably elsewhere for a limited time.
Also, if you are willing to stretch "bitcoin mining" into "earn bitcoins for hashing" then there are merged mining pools which convert NMC->BTC automatically (see sig) and so can offer 9% more income (soon to drop to 7%). Things have improved a great deal in the past week or so thanks to shads' work.
There are lots of things to consider but if you want an excellent rate with practically no risk or variance, abcpool.co's 0% PPS is highly recommended.