Again, Shadow has nothing to do with cable pull. Shimano has not changed the cable pull of 9 speed rear derailleurs. Shimano has never been a fan of mixing and matching parts and their standard response is to say it is not recommended.
I am currently running a 9 speed Deore Shadow rear derailleur with 10 speed road shifters(which have the same cable pull as 9 speed MTB and road shifters) with no issues. The cable is attached to the outside of the pinch bolt, BTW.