I just competed at the West Coast BJJ Tournament in San Francisco. The tournament went really smooth, the only thing that sucked were the mats. Everyone from the white belts to the black belts were sliding on the zebra mats.
I train at AKA and they use Swain mats which have a much better grip.
I hope if there are any tournment promoters reading this please do not use Zebra Mats because I do not want to play slip and slide while I have some one in the cross-body.