1) Generally speaking, yes, though RnG and motion are quite different tactics and the success between the two share no true link.
2) Motion, but good passing and flow in RnG is integral all the same.
3) RnG, but the skills are integral in a motion as well against a solid OD.
This thread covers 2) and 3) so you can draw your own conclusions: http://www.buzzerbeater.com/community/forum/read.aspx?thread=116609&m=22