Really? I would have thought that SATAII would enjoy much higher bandwidth over IDE either way.
IIRC from watching the screen savers a few years back...
Think of IDE/PATA as 2 lane highway (for size comparisons) and SATA as an 8 lane highway. Clearly the SATA highway can handle more cars on it, but both highways have the same speed limit of 65 MPH.
In the case of Optical drives, the read speeds of disks is pretty slow as compared to hard drives. So the amount of data traveling down the PATA highway is fairly light on traffic. So a 8 lane highway isn't going to get the traffic to their destination any faster.
And just like traffic, too much traffic will cause congestion and slow it down, IE reducing the speed of traffic to say 20MPH. This plays a role when using multiple drives on one PATA/IDE cable (2 HD's or 1 HD and 1 CDRW etc etc). But since SATA has dedicated cables per device, traffic jams rarely, if ever happen.