Yes, VAT refund is the one you get at CDG.
About the possibility of long line and missing the plane, that's why you have be there EXTRA early, habanerita!
I actually was in a similar situation a couple of years ago... Although there was only one person before me on the line, there was no one at the detax window! And nobody could tell us when an agent would come back. The girls behind us left, tiring of waiting and afraid to miss the plane. But I wasn't going to leave without my refunds, so I just went to the next terminal and got my papers stamped.
I noticed something new from my last trip, which were these machines supposedly to help you with the detax process. You are supposed to scan the bar code on the top of the papers and work through... They had these machines right next to the detax window before security and after security, between the waiting areas.
But they must be either not efficient enough or not set up fully yet. There were two flight attendants right behind me in the line to get the papers stamps and they were about to miss their flight. As I took a VERY long time with my items, since the agent wanted to see every single Chanels I bought, they tried to use those machines. But for some reason it didn't work. I wonder if it's still not set up fully and would be working 100% soon. If so, I guess they would be really helpful for those who are running out of time.