I tried something similar to this today. I summoned a lvl 21 Shaman to Falcon Watch, partied him with my 73 DK and killed a few hellboars (lvl 60 or so).

The shaman got 42xp per kill....



I don't know that things would work any differently in Shadowmoon, unless you were pulling a truckload of mobs and killing them before they sought out your lowbies. (I had two hellboars charge past the guards and right into Falcon Watch just to get at my shaman. He was dead before I realized what was going on. DK was looking the other way, thinking they were safe, what with being in the village and all....)