3 UB bags in a 6qt

This might just be anecdotal but I've always used 2 bags in a shoebox like the guide says. But I recently had an odd number of spawn bags so I just put 3 in a shoebox. Boom! The biggest fruits and the best canopy I've had yet. Only just harvested the 1st flush but the 2nd one is coming on fast. Anyone else have testimony about this?