I'm a long-time GM, but relatively new to this system (been playing it for 6 months, run about a dozen sessions in that time).
Something that makes me think I might be doing something wrong: people on the boards frequently comment that combat moves quickly in this system. That has not been my experience. The combats I run take relatively few turns (3-5 unless it's a really big fight) but each turn is extremely long--I've had a turn take well over an hour with four players and half a dozen enemy characters/minion groups in the combat.
We do play via Google chat, so that may be slowing things down a bit, but what seems to take up the most time is all the decisions that need to be made every turn. Not just who are you attacking and how, but are you using dodge, are you using parry/reflect, how are you spending action/threat/triumph/despair (this is a big one).
I love the dice system, but I'm wondering if I might be missing some important tricks that other people use to make combat go more quickly...