In the event no one has checked it, I'll link a post Ceromus made in the tech support forum:

http://forums.worldofwarcraft.com/th...318485&sid=1#0

I have to say that I haven't played in a while due to some system issues, so I haven't been able to test anything or actually see what's going on. It looks as though Blizz may have stealth nerfed /follow to stop some exploits.