delay setting for when the bar reappears

i think that a possible delay setting for when the bar reappears will be a good idea.
for exemple look to rocket dock on windows: the better and simple dock on windows.

why a delay ?
because when the cursor touch the side of screen, the dock IMMEDIATLY appear : also when it's a mistack, when you don't really want use the dock!
and the dock don't disappear immediatly.
it will be better to have a delay to activate the dock: when you realy want use dock, you juste wait few time with the cursor on the side of the screen.
[i'm french, sorry for my english]