Random is easy to achieve. It doesn't take very many rolls to make something close to the standard pryamid. On the flip side, a player never sees the long term in a craps game. The things like a 164 roll hand, 16 yo's in a row, 12 fours in a row, etc. The more variables in a game the greater the chance they will see more of these or fewer than the average player in their lifetime. You will see a few yet, you will never see them all. The biggest variable between an ETC and a table in no particular order. How often the dice are changed, The levelness or not levelness of the table or machine. Players and dealers leaning on the table, hands, chips, players changing the dice outcome from the previous result, dealers changing the dice result from the previous result, etc. etc. etc. Azure had to change their programming a while back to pop the dice to the ceiling at random intervals. The machine was too close to a true pyramid. It didn't have enough volatility.