well first what you do is, i usally go around yelling "LOOKING FOR A JEDI MASTER" and usually some guy says i will be your master (accept any1 as your master that is a high lvl). Then you ask him if he can take u graul grinding, usually they say yes, then when he takes you, just sit back, relax, and watch!
there is no gurantee you will level up from grauls in that short an amount of time. Also if so it is the way the game was intended and this is not long enough to be a guide. Also, people would get mad if you arent doing your fair share. And one last thing once in a high levels group you get exp as if you are that level so why not goto a better grinding spot then grauls(clearly saying im a noob), and either way you are getting little experience. Huge Nay on this.