Unless I am doing macro needing a lot of sharpness or a high DR shot (where I need RAWs) , the jpeg off the 5D3 is pretty good at even high ISO.... and still usable with LR.
I usually shoot both raw+jpeg. The jpeg goes to the SD card and RAW to the CF card.
I load the SD card (jpegs) to LR and play around. for the most part I don't feel the need to use RAWS. But maybe on 10% shots, I need to use the RAW's which I do via DPP. So this Hybrid approach gives me speed and quality without spending all my time PP'ing.