one thing i noticed about using the cards with bigger indexes, is that they are easier to read on the board from all the seat positions. DUH. that is so obvious. but what wasnt so obvious is that the game speeds up a little. the players can see the cards better and take less time figuring out what they have. or not having to double check all the time.
so in essence it makes the game faster and with more hands dealt out more money can be made.
it isnt a monumental leap of hands but over a years time it will make a difference. and we do play for the long haul.