Got mine last night. I noticed better screen/app transition speed on stock launcher. But it's still not as smooth as my Gnex was with stock JB. Razr HD seems to have a lot of bloats loaded to memory though its UI looks close to stock android, so maybe that's why it feels more laggy than Gnex. But in Nova launcher RHD is very smooth.
Another con I noticed on RHD is that it doesn't allow to disable some verizon bloats like verizon video, VZ navigator, etc. I can only force close them in all section of app setting. Is there any way to disable verizon bloats without root or force closing them is just like disabling?