While you're still looking for the same eight outs there are fewer total cards in the deck, thus increasing the percentage you'll make your straight. Just to highlight one example, filling an open-ended straight draw becomes more likely in short-deck poker. The odds of hitting certain draws change, too, in short-deck poker. Straights and full houses are also easier to make in six-plus hold'em than in the regular version of the game (a reason for the alternate hand rankings). The smaller deck makes it easier to make two-pair hands, which means a hand like top pair-top kicker is no longer as strong in six-plus hold'em as it is in regular hold'em.