Just curious Akrasia - when you say "the slowest system you've encountered", do you refer specifically to combat, or to more than that?
BelenUmeria, I can definitely see where you are coming from, especially at higher levels; but even at lower levels, if you have a battlefield where the cleric just cast bless, and the PC's are fighting from higher ground, and there's a darkness spell covering the battlefield, things just got three times more complicated for every player at the table. I had a battle this Saturday where this very thing was highlighted, and three times we had PC's who we ret-conned misses into hits because they had forgotten about the bless in the middle of the battle.
With regards to speed, however, the experience has been in 3E's favor in my group - My experience has been mostly lower-level in 3E (1st to 9th level), but in combat-heavy sessions I've run as many as four combats in 3 hours, as opposed in 2E to only running 2 per 8 hour session - I was loath to try any more than that, due to the time sink. Granted, I also treat my NPC's more freeform, giving them stat blocks more like 2E than 3E, but I will stat up my NPC's when I get the time to do so.
However, I don't see an easy answer, short of removing most spells, and stripping the tactical heart out of the game - which IMO would not be a good goal, but one that diminished the current game. It can be fun for a player to figure out that a well-timed dispel magic can turn the tide of a battle, or to see the look on the fighter-player's face when he triple-cleaves the ineffectual enemy, or the look of horror when a 50-foot awakened scorprion comes air-walking over your battlements, ranting for your blood.
