Nope, not the ATB bat wing grind of the outter chippers, this was straight down the middle of the dado. We arent talking much of a difference here, but the dado would be "striped" along its length. Say i plowed a 5/8" wide dado, i would see 1-8 distinct lines that were 1/8" wide along the length where a chipper was a smidgen taller or shorter than the other chippers and outer blades. The reason i mention the Maloof joint is because that is exactly the situation i had where i discovered the discrepancy. I ended up having to alter the depth of the dado with a router plane to level it all out.