Sitting at the "All in allowed" Just gives the player that option, if he chooses to do so. The play is no different at either table, it just gives you that extra bit of protection. I mean if we are having bad weather here (like every summer day) and there is a chance the electric may go out, then it is a good idea to play at a table that allows it. It sucks when you have a good hand and you are pot committed and the power goes out and your hand is folded.
From the Web site:
ALL-IN
When a player puts the last of their chips into a pot, that player is said to be all-in. An all-in player is not eligible to win any money bet above their final bet. The excess part of the bet is either returned to the bettor, or used to form a side pot with another player or players who matched the amount bet. There is no limitation on the number of side pots. However, the all-in player will be eligible for the main pot, and therefore cannot be forced from the hand.
Sometimes a player has enough chips to continue betting or calling but has been disconnected and unable to respond. In this case the player is also deemed to be "all-in" for all the amount of chips he has bet on this particular hand. If this happens repeatedly, it probably means your Internet connection is poor. We therefore recommend that you stop playing for a while, and wait until your Internet connection improves.
If a player failed to act within the allotted time (usually 30 seconds) while being connected, the hand is folded and a corresponding message sent to a player by email explaining the system action.
NO ALL-IN TABLES
These tables are identified by the words "no all-in" in parentheses after a table name. These tables do not provide the all-in protection described in the section above. If you disconnect from a no all-in table, you are given extra time to reconnect. But if you are unable to respond after that extra time, your hand will be folded. If you have a poor or unreliable Internet connection, we recommend that you don't play at the no all-in tables.