From a newbie ice climber:
I use laser sonics, and like them. I find the BD flip out handles difficult to manipulate with gloves, but then again I haven't placed very many. The few Grivel 360s I've placed seem to go in very quickly, but two of them worked their way out of my ice clipper on a single pitch once and wound up at the base. Presumably their long, funky hangers had something to do with it.
Racking: I've started using 6 ice flutes (3 per side) on my harness, and that seems to be fast, easy, and flexible, even with big gloves. It also keeps the screws from banging on and dulling each other, or catching on things. I've got an ice clipper on either side, just forward of the ice flutes, that I carry more screws on. Personally, I find unclipping screws from ice clippers awkward. I've been carrying quick draws on the forward gear loops, but I'm going to try moving them to the aft gear loops and/or shoulder slings so they don't interfere with the screw hangers.