I've recently been getting my head around suspension set-up and trying to get to grips with what the bike is telling me and what I need to do to tackle the feedback I'm getting. I found this great document on suspension setup that covers everything from setting up SAG to adjusting clickers. Well worth a read for anybody interested in finding out more.
Here's a quick excerpt about how the front and rear comp feels with too much and not enough dialled in...

"COMPRESSION DAMPING
Rear Suspension
Too much comp. can cause:
- Rear wheel slides under acceleration
- Harsh ride over bumps, poor ‘hook-up’
Too little comp. can cause:
- Rear wheel starts to bump sideways under acceleration out of corners
- Bike will squat too much under power and cause front end to lose grip.
Front Suspension
Too much comp.:
- Good result during braking
- Feels harsh over bumps
- Pattering mid corner
Too little comp:
- Strong diving on the front
- Unloads the rear too early causing loss of grip
Note: Front end compression adjustment should harmonize with the front fork oil level."

http://teknikmotorsport.com.au/core/...9bcc6c&whence=