O.k., have you tried the 1/8" turn adjustments? How did that work?

If you have an XTR, there is a spring tension adjustment you can make to increase tension which produces quicker shifts. There is a phillips head screw located between the parrallel plates on the derailleur body, kinda near the cable set clamp. Turn that 1/4 turn, and it'll increase the tension.

If it's shifting well in the higher gears (smaller cogs) but hangs up in the bigger cogs, chances are you're dealing with a bent derailleur hanger. There is a special tool that ALL shops have to check this and adjust. Take it into the shop and tell them your hanger is tweaked. They will probably charge you a minimal fee. I would also consider buying two extra hangers while you're there. Most hangers are aluminum or low grade steel, and are designed to fail in the event of a crash or an object hitting the derailleur. Since they are either aluminum or cheap steel, you can only bend them back slightly, and only once or twice before you compromise the integrity. They're relatively cheap, but usually a long lead item to order, so buy a new one, and a spare!

L8R