Tiger - No

[samsc]

10.4.2 is a lot better.

still opengl performance is down from 10.3.x

and spotlight and dashboard are terrible resource hogs.

[samsc]

found a hint to make dashboard go away:

http://face.centosprime.com/macosxw/?p=201

Make Dashboard go away

defaults write com.apple.dashboard mcx-disabled -boolean YES

Make Dashboard come back

defaults write com.apple.dashboard mcx-disabled -boolean NO

You have to restart the Dock to have this take effect

This has not been tested by me.