A Pro's response:
Check out ADCC News with the latest interview with Vitor "Shaolin" Ribeiro.
KP- Do you still train with the Gi?
VR- Yes, 3 times a week. I'd like to train EVEN MORE, because the Gi REFINES your technique and that helps you even in an MMA fight. I have to limit it to 3 times a week because I have other aspects of training that I have to do for MMA so I have to allocate time for that as well
So, you can all put your GI's back on now thank you.