In a way yes, when Blocks are static in POS it's a little like a lottery (because the same amount of reward is being generated each Block and each day) you would assume that larger Blocks are better because they would Stake sooner. The Skill is in finding that sweet spot in which you can generate the highest amount of Stakes possible with the amount of Coins you have. I thought larger Blocks were better too until presstab broke up all his Blocks super small, I called him crazy but he proved me wrong. There is such a thing as too small as well and may dwindle at max age if going too low, if lots of people start using small Blocks, then you would need to use larger Blocks in order to compensate.