ChoppyChoppy
Tree Freak
Hard to know how individual pieces of wood are cut, what different companies use, or when it is operator skill, etc
I have seen the Holtec saws used at lumber yards leaving pretty uniform ends. Not sure what Lowe's quality standards are.
Philbert
Their standards are if it sort of looks like lumber, let's sell it. If you need rocking chair runners, hockey sticks or candy canes, that's the best place to go! I don't bother anymore, the local place is a bit more $$, but the lumber is 10x better. Their cull pile is nearly better even.
I bought a bundle of 2x4s and so did a friend, we ended up returning well over 50% of it, and even of the 25% that was usable, alot of it was pretty crappy still. There were some that were like 3" wide, some 1.25" thick, half blown out with a sap pocket, nearly broken in half, bark on an edge still, etc.
I'm pretty sure they end up with the cull wood from everyone else!