Originally Posted by LtL
Normally a slow eccentric is a sign of not being confident of your bar path.
On a serious note, yeah LtL summed it up here. Pavel has written a hell of a lot on a speedy descent for Benching (not just for Speed Benches) and it has worked a treat for me. A speedier descent will leave you with more energy to perform a speedier ascent. It also makes the pause look more prominent to the judges.
You really just need to drop that bar (under control) like it's hawt.