I may have an unpopular or unconventional opinion on this matter, but I do not make and of my girls use grips unless I see that they need them. Sometimes, girls are better off with grips for bars, and sometimes they fare better without grips. There are many factors involved in my decision on this matter, but they are always individual to the athlete. Things such as the girl's grip strength, the girl's hand position on the bar as she swings, the rate of peeling (if at all), her description of her own grip to me, the size of her hands, and the rate of rips occurring. I think it's better to have a natural feel for the bar, but I also understand that if a girl needs grips, she needs grips! I will certainly not stand in the way of that. I have nothing against grips, but I feel that they are not necessary for every girl, and in same cases, grips can actually be a bit detrimental to some athletes.
I have arrived at this decision after observing a number of things over the years. Many high level athletes such as Georgia Dabritz of the University of Utah fame, as well as a number of elites, have had incredibly successful careers without ever wearing grips. One of my own athletes who is a great bar technician, has never had an issue training bare handed, and has never even had a single rip in her three and a half years of doing gymnastics, and she is now training Level 7 for the coming season! Also, I have observed a number of my other girls doing just fine without grips, where as some have needed grips quite early. I also do some grip strength related exercises during our conditioning, and I have noticed that some girls just need grips, while others can perform well if their strength has improved. The rice bucket is a beautiful, wonderful conditioning tool! The fine motor control needed in the hands can be developed into a very strong synergistic system, and all the muscles working in concert can do incredible things. However, some girls are not capable of this degree of strength and will need grips.
My view is simply that if they are needed, they should be used. If they are not needed, then there is no reason to mandate it.