I have a Glock 23C & 32C, I've shot them both at night, one has a Surefire X200A weapon mounted light, the other I was using a Surefire C3 hand-held light, I noticed NO, I said NO muzzle-flash or huge fireballs, and I'm talking several hundred rds! I was able to provide quick follow-up shots without any trouble. As far as firing from retention, maybe I'll get burned someday, or maybe I won't, but that will be my problem. You can make faster follow-up shots with the C models, that's a fact. If somebody doesn't want one, or doesn't see the need for one, or is just scared to have one, then by all means don't get one! But for those of us who have them and like them, what's the big deal?
Just to make everybody happy, buy a "C" model and a extra non-comped barrel and decide what you like best!
Have a nice day!
teamroper2004