99 Plymouth Breeze Issue?

My car starts a little hard. When you turn the key to start it takes a split second before it'll crank. The starter engages, hesitates, then cranks. It cranks just fine it just seems like it takes a little bit before it'll turn the flywheel. It seems like the battery has lost it's cranking amps but the meter says the CCA is 660. The battery is about 1 1/2 yr old. I had the electrical system checked twice - once at Firestone and once at Advance Auto. Both times the battery, alternator, and starter checked out fine. Had the battery terminals cleaned. Any suggestions as to what my probem could be? The guy at Advance Auto suggested maybe the ignition coil?