I disagree due to the oil pressure being behind the bearing until it gets to th oil hole to feed the cam that's also lined up with the main oil feed. It can't build a wedge to fight against the valve train pressure pushing down on the cam. It's supposed to be engine upright, 10 and 2 o'clock on the front and the last four at 2 o'clock. This creates an oil wedge under the cam between it and the bearings. I have an 880 block with 15k on it and the cam bearings only have ⅓ worn out from the bottom of the bearings due to aligning them in the fashion your stating. Oddly my engine had really good oil pressure but it's an aftermarket hp pump. Pulled the cam and lifters to inspect them when I noticed the bearings worn on the bottom side.