I'm not superstitious. But I do see "luck" playing a part.
Example: Thunderwolf Lord and remaining SGT, both with PW/Storm Shields charging a lone Vindicare Assassin with one wound remaining. Statistics say just remove the figure from the board, as by Mathhammer, he's dead meat. Now, on the tabletop, the Vindicare was only wounded four times, and made all four 4+ invuls, did one wound, and the TWC broke. Mathhammer says this doesn't happen. Luckily, it did for me. And that lone vindicare with one wound escorted them off the table. Again, Mathhammer says TWC easily outdistance a Vindicare on foot to autorally. Dice luck gave me perfect fleet rolls to keep me within 6". So does luck happen? Yes. Do you call on the Patrons of Chance for your dice? Nah.