Re: Define grappling
as always - when there is a huge skill disparity size and strength aren't a big issue. However it's rare the disparity is soooo large that it doesn't factor into it all. As skill gap decreases the role of size and strength increases.
But as Kevin says - if you can do what we call getting inside their OODA loop you're in a pretty good postion - and that's pretty much the goal of both BJJ and Aikido I'd say.