The line looks good because of the offensive approach.
We saw the same with Martz and Faulk as we see with McVay and Gurley.
Two guys that all of a sudden have space to run and they go to another level.
Faulk was a less than 4.0 ypc player before Martz and than 3 seasons of 5.5., 5.4. 5.3
Gurley had that dreadful year of 3.2 ypc under Fisher and than an explosion under McVay. Create space and keep the defense guessing an it helps an offensive line as instead of 5 guys blocking 9 guys, the 5 guys get to block 5 guys.