The concept does influence the music hence there isn't really anything you can call a real west coast banger on it, Kendrick is portraying a different side to Compton and the west coast. Dre obviously pumped the bass when mixing but this isn't that lowrider music the west is famed for. The skits aren't the only thing that makes this a concept album the sound is extremely cohesive almost as if there are no tracks and its just one long soundtrack. I was actually going to compare this to A Prince Among Thieves, I think it will eventually get an annual play from me. Prince Paul can also take the concept too far I've heard half of his new album is just skits.
The album does sound pretty "cohesive" I guess, but I still don't see how the beats all being sorta mellow makes it a concept album. The storyline and characters in Prince Among Thieves actually stayed in first person through the songs. I love this album but if there were zero skits, I'd have no idea there was even a theme binding any of the songs or beats together. Did a single producer do every beat?
EDIT: If this is a concept album, then the Frank Ocean album is a much more personal and affecting concept album to me.