I drive a 5-speed car and I've also had the hard start twice. The first time was ~4 hours after a 40 mile drive and it cranked for a long time before starting. I took it to the dealer and they "fixed" it by replacing the battery. The second time was when it was sitting for 6+ hours after a 2.5 mile drive; it took less time to start but sputtered until it went back to normal PZEV idle speed.
No more problems now and it has probably been one month.