Tipping on the circuit

[ZootMurph]

I've got a friend who works at the Borgata, and she was telling me the tips were extraordinarily poor from the top two finishers in the main event ($15k and $2500). From what she tells me, Mr. Sklansky, the 3rd place finisher, tipped over half what the winner tipped ($8300) and Chris Bell tipped almost as much as the winner ($12k).

I've always tipped 3%-5%... This is a sick state of affairs when someone wins $800k and tips $2500. My question is what is considered a 'normal' tip?