Yep- not at all uncommon on cross and mtb's. Not only to keep the cables out of the crud, but to keep the cables from being damaged when you bang the bb shell on a rock or some other obstacle.

OP- FB's suggestions were good. From what I see in your pic, the exit from the ss stop is at an angle. I'd clamp the cable a bit closer to the dropout so the run is straight, then form/route the cable to the dr as FB suggested- "straight." The loop will be tighter (think 2" radius max) but any increase in friction will be less than having the cable exiting the stops at an angle.