Brining works very well on Poultry. It also works well on thinner cuts of pork. I have never tried it on large pieces of meat.
To be honest, I haven't yet used an injection either (though I will be this weekend) and pulled pork has always been juicy and delicious!
2013 Stumps Classic - Delivered 4/15/13
Large BGE - Rescued 2012
2010 WSM 22.5"
2010 Weber genesis gas grill
Rescued 22.5 Weber One-touch gold
BBQ Guru CyberQ
2011 Built UDS - Retired